Cleo de Nile/cartoon

Cleo de Nile debuted in the cartoon series in the Volume 1 webisode "Jaundice Brothers", which premiered on May 5, 2010. She is voiced by Salli Saffioti in the English version of the cartoon.

Webisodes
When Radio KBLOOD announces a contest of which the prize is that the Jaundice Brothers come play at the winner's school's homecoming dance, Cleo helps Frankie put together a tape to sent in. As luck has it, they win the contest. Cleo participates in Monster High's 1361st Annual Charity Talon Show. One of her competitors is Clawdeen, who takes the stage just after her. Cleo attempts to sabotage Clawdeen's performance by turning on the spotlight, which works as a substitute full moon on her. She loses control, but rather than it being disastrous, she improvises her way through a killer dance that easily beats Cleo's. Cleo is hosting the fearleading try-outs and is busy explaining the high demands of the Fear Squad to the candidates when Frankie bursts in. The simulacrum's hand becomes detached, and Frankie performs several difficult moves to get it back, earning herself a spot on the Fear Squad despite Cleo's objection. Cleo's Trigular Calcometry 101 class is hosted by a substitute teacher, Lou Zarr, who does not get along with the class. A conflict with Deuce leaves him petrified, upon which Cleo and the other students consider the class dismissed. When Clawdeen shows up unprepared for the SAT that day, Cleo advises her to copy Ghoulia's answers. Cleo is annoyed that Draculaura dares suggest her crush is hotter than Deuce and tries to sabotage her chances. She advises her to touch up on her makeup first and offers to do it for her. Rather than making Draculaura prettier, however, Cleo makes her look horrendous. Amazingly, Heath digs the look, so Cleo's plan is foiled and Draculaura gets her date. Cleo has her locker door smash closed on her by Frankie's haywire charge, causing her earrings to become stuck in its vent. It's Picture Day, but Coach Igor's covering Study Howl and he's obsessed with sport. Cleo and her friends make a looks-destroying escape from a looks-destroying workout, though Igor eventually catches up to tell them they won't have run lapses because of Picture Day. When Frankie develops a zit on her cheek, Cleo makes sure to take a picture and send it to all students. Irony strikes when she herself becomes covered with zits. Cleo vies to be the leading lady of the school's production of Hamlet, but Clawdeen is her main rival. The two sabotage each other's auditions to the point they both end up in plaster while Draculaura gets to be leading lady.

An eyeball fight breaks out during Biteology and Cleo participates. She is later chased out of the girls' bathroom by a frog infestation. Following a collision with Frankie in the hallways and Cleo's subsequent struggle to get loose, which resulted in a statue being knocked over and broken, the two girls are ordered to Headless Headmistress Bloodgood's office. There, Cleo puts all the blame on Frankie. Bloodgood accepts this and then informs Frankie that breaking the statue was a good thing because one of Monster High's first teachers had been locked inside of it for millennia. Frankie readily accepts the praise, much to Cleo's regret. It is both Friday the 13th and Halloween, a rare occurrence that spells bad luck galore until three o'clock. Cleo calms her panicking friends by assuring them that her amulet will protect them. However, Ghoulia's carrying the amulet and she just walked off. The girls chase after her to be safe, only to find her use the amulet to get to the big clock and adjust the time to three o'clock. Cleo forces Ghoulia to switch science fair projects, meaning to take the credit for Ghoulia's superior work. Because Ghoulia can't stand up for herself, Cleo gets what she wants and stakes a claim on the Mad Science Fair's throne. That is, what she thinks is a throne, because in reality it's Lagoona's project: a chair with a water-dunking function. Knowing what Cleo has done, Lagoona hands the remote to Ghoulia. When Frankie's friends discover she's never seen a movie, they promptly take her to the auditorium to watch the entire TwiHard series. In preparing for the movie session, they overtax the room's electricity net. To solve this, the group hooks up the equipment to Frankie, allowing the movie session to go through but Frankie not to watch anything. Cleo mistakenly thinks that Clawdeen is also running for Scream Queen. In order to thwart her supposed rival, she spreads a rumor that Clawdeen suffers from a case of fleas and can no longer compete. The rumor gains a life of its own, however, dropping the fleas and promising a school carnival if Clawdeen wins. Clawdeen is voted Scream Queen, while Cleo seethes in silence. Draculaura has a chance to meet her perfect guy, but she has to get into contact with him before school's out. Cleo works on a Plan B to help Draculaura meet with him in time in case her other friends fail, which they do. Plan B is Deuce Gorgon, who is tricked into turning Draculaura's crush to stone. Because she deserves an A for her work, but only gets a B+, Cleo uses a mind-control idol on Mr. Rotter to get past his "No A's"-rule. But after having gotten a taste of the power of mind-control, Cleo continues using it even for gain she does not deserve. At the end of the day, the idol has her pay the price by taking away her hair. Cleo partners up with Deuce to take care of an egg for a whole week as an assignment for Mr. Hackington's class. Deuce petrifies the egg to guarantee that it won't break, promising it'll return to normal in a week. It doesn't. Cleo tries to manipulate Frankie into spilling whom she's crushing on through a game of Truth or Scare during a sleepover. Frankie chooses truth and is ordered to send a text reading "party at my house", which she does. Cleo is amused only until she realizes the text was sent on her own cellphone. To help Lagoona with an unexpected parent-teacher conference, Cleo, Clawdeen, and Frankie dress up Slo Mo as Lagoona's aunt Lantic so he can figure out what the conference is about.

TV specials
Cleo is the first ghoul to meet Frankie, and is not impressed by the modest New Girl at all. Every day during Frankie's first week she seems to attack Cleo inadvertently. During Fearleading tryouts Cleo preforms a cool routine. Frankie accidnetally throws a smoothie on the team captain, Cleo. This upsets the mummy but she becomes interested in Frankie as a member for her spunk. Cleo has a one-on-one interview with Frankie, the two get along until Frankie fibs about having a boyfriend. The boy Frankie calls her boyfriend is in realtiy Cleo's for true love-interest, Deuce Gorgon. Furious at the notion of Deuce cheating, Cleo pushes him away in the cafeteria. Cleo is found crying at the pool and tells Frankie she is considered dead. Clawdeen and Draculaura ask Cleo to talk with them; it turns out to be pow-wow bewteen her, Frankie and Deuce. Frankie admits to lying, Cleo is relieved to have her boyfriend back but is still upset with Frankie. Frankie makes it up to her by giving her a Justin Biter concert. Deuce and Cleo dance during the concert; the mummy then tells Frankie to show up at Fearleading.

Webisodes
As the captain of the Fear Squad, Cleo is not quickly satisfied, much to the annoyance of most of the team. Cleo is oblivious to this and thus it comes as a shock when the fearleaders desert en masse. Only Frankie stays, forcing Cleo to swiftly organize try-outs. Cleo and Ghoulia have finished promoting the Fear Squad try-outs and are on their way to the gymnasium to meet the new recruits that Cleo is certain have gathered. Bar Frankie, the gymnasium is empty. Because Cleo gives up, Frankie starts her own recruitment drive, finding new team members in Draculaura and Clawdeen. Once Cleo hears she's got a team again, she is back to her bossy self. Cleo is unhappy with the new Fear Squad's performance yet and orders them to attend every school event for the time being to gain experience. All of their cheers have disastrous consequences for the school's performance, making Cleo fear for their chances to be invited to Gloom Beach. Having received an ambiguous letter from Gloom Beach, Cleo loses herself in doubt whether her Fear Squad will be invited or not. During the Spirit Rally, Cleo can only worry and so abandons her teammates during the cheer. A text comes in that the Fear Squad is not invited to Gloom Beach. Cleo breaks down, but Frankie informs the team they still have a chance if they go for the wildcard arrangement: create a fearleading video and get it a million hits on FrightTube in two days. Though the odds are low, the Fear Squad imediately gets to work. The Fear Squad's video has barely gotten any hits, so the team tries to promote it. With Ghoulia's help, they manage to lure in a big audience and reach 999,999 hits. However, FrightTube chooses that moment to crash. The Fear Squad anxiously looks on as Ghoulia tries to do something about the crash. Despite her best efforts, the clock strikes 3:00 PM before she succeeds. Cleo tearfully thanks her friends for all they've done, but the mood is promptly improved when Deuce delivers the news that FrightTube crashed because of all the traffic to their video. Rather than a million hits, they've got twn million hits. Their Gloom Beach invitation follows soon after. During the ride to Gloom Beach, Cleo has an ominous dream about their chances to win. She awakes when the bus arrives, only to find that the Fear Squad will be staying in a decrepit cottage. When Scary Murphy hands the Fear Squad a list of chores to do, Cleo is the only one not to question this. At least, not to her team. That night, she goes for a walk to sort her thoughts and is approached by the werecats to let them back on the Fear Squad. She refuses.

After finishing the chores, Cleo and Ghoulia work out a routine while the rest of the Fear Squad relaxes at the beach. The Fear Squad gathers at dusk to memorize the routine but they are watched by the werecats. It is discovered only at the competition that the werecats stole the Fear Squad's routine and gave it to Smogsnorts. Cleo uses the movements from the chores Scary Murphy had them do to improvise a new routine, which wins them the spirit staff. Cleo and the rest of the Fear Squad have become a target of revenge for the werecats. She is made to believe she's lost her Queen Bee status and is desperate to do something to get it back. The werecats trick her into agreeing to stay at Monster High on the night of Friday the 13th so people will talk about her again. Cleo is glad her friends agree to join her in spending the night of Friday the 13th at Monster High. They encounter a monster roaming through the school, but it turns out to only seek people to celebrate its birthday with. During lunch, the topic moves to relationships and Frankie lies she has a boyfriend. The girls want to meet him, so Frankie brings a life-sized voodoo doll to school the next day. Weirded out, the girls assure Frankie she does not need a boyfriend to fit in. A popular student, Cleo spends her whole morning signing fearbook copies. When she returns to her locker, she discovers it to be stuffed with balloons just as Mr. Rotter walks by. He warns her the balloons better are not part of a prank. Ghoulia has discovered that the werecats are behind the odd events of the day. Her friends thus confront the trio and learn that they plan to pin the blame of a stink bomb on the Fear Squad so that they'll get expelled. The group rushes out and collects the bomb before it drops. Cleo becomes suspiousus of Deuce keeping secrets. She gathers information fromfriendss and assumes he's cheating on her with Operetta, a ghoul he has more in common with. A jealous Cleo deamnds Operetta stay away from her man, loudly in the cafeteria, which leads to her humliationn whenOperetta's spider scares her into a tray of food. Cleo then confronts Deuce and learns his secret is his anniversary with the first thing he ever petrafied, his pet dragon Smokey. Cleo is happy to still have Deuce but refuses to make amends with Operetta. Spectra sends Cleo a picture of Deuce hanging out with Operetta. Cleo spies on Deuce and Operetta. She finds Deuce writing love lyrics and assumes he's fallen for Operetta. The mummy loudly tells Deuce she's dumping him for cheating in front of many monsters in the school hall ways. As she turns to walk away,Cleo is frigthened by Operetta's pet spider and has headphones placed on her ears. Cleo discovers the lyrics are Deuce's feelings for her,causingherr to happily return to her boyfriend. She procliams to make all of her friends listen to the song, she gloats in their expected jealousess. Cleo is livid to see her cruel older sister become the fearleadingg coach.Even after telling her concerns to Bloodghood, and saying over and over again that Nefera is pure evil the ghouls are still forced under Nefera's incoherent instructions. By the end the four are replaced by the werecatt trio. Cleo is certaintolosewhenher sister uses their family's talismins against her team. Deuce encourages her to do her best anyway and promises he and their friends will protect the ghouls from the totems.

Special webisodes
TBA

TV specials
Cleo takes advantage of Ghoulia's kind nature. A bad natured vampire named Gory competes with Cleo for superority.

Webisodes
Frankie, Clawdeen, Draculaura, Ghoulia and Abbey sleepover at Cleo's house. The ghouls, except for Abbey,allow Cleo to win. Abbey does not go easy on Cleo and the pirncess is happy. ☃☃ ☃☃ ☃☃ ☃☃ ☃☃ ☃☃ ☃☃☃☃ ☃☃ ☃☃ ☃☃ ☃☃ Cleo throws a party,Draculaura becomes ill. The other ghouls say they'll cancel the party for her; Cleo does not see this as an option. ☃☃ ☃☃ ☃☃ ☃☃ ☃☃ ☃☃☃☃ ☃☃ ☃☃ ☃☃ ☃☃ ☃☃ ☃☃ Cleo is excited for Ghoulia to recieve her first kiss. The two friends swtich bodies by touching one of The Mummy's idols. They do not tell their boyfriends during their double date (because where's the fun in that). From hieroglyphic instructions the two try random stunts to undo the magic. Deuce and Slo Mo try to kiss the ghouls, at the same time, and the spell is undone for the ghouls and the switches the boys. Freaky Fridate Cleo and Deuce laugh at Frankie and Draculaura's alien ideas. Cleo becomes Frankie's campaign manager for student president. When SloMo becomes president, the princess tells him about her birthday-as-a-school-holiday idea. Cleo complains about walking through the maze.

Special webisodes
TBA  Cleo tries to help Ghoulia enjoy their beach vacation, against the zombie'swishess. Thinking she's borrowing a fur coat,Cleo offers to sit the class pet for Rochelle. Cleo's radio active nail-polish mutates the cookies her friends bake for a sale. The monster attacks the kids until Heath cooks the goop. The others leave Cleo to eat the mess.

TV specials
Cleo and Clawdeen plan Draculaura's sweet sixteen hundred. While searching for Toralei, who stole Cupid's bow and arrows, Cleo is shot and falls in love with her reflection in Deuce's food tray. While no longer in love with Deuce, Cleo rejects the slightest touch from him. Cleo demands Deucewinhermoreprizes than Clawd does for Draculaura; he tries and fails. Cleo's servants drop Nefera's borrowed items in a trench; Cleo is not guilty. The mummy enjoys the trip on Lagoona's yacht. She does not enjoy Farnum's gross boat or how the Tiki natives worship Frankie instead of her.Cleo is even more envious when a giant (hot) monster kidnaps Frankie into the jungle 'when it should have been her.' Cleo wraps Deuce's injuries. Cleo gets on the skullimate team, only by her friends' wishes. While the girls practice, Cleo has her servants participate for her. Operetta takes her place on the team, Cleo is more than fine with such a set up and enjoys wearing the new uniforms on the sidelines. By the urging of her father, Cleo leads a civil war between monsters and normies. The Mummy also tells Cleo breaking up with Deuce is what's best for her but she is slow to act on that demand.Cleo bonds with Lilith VanHelscream over shared fashion tastes and control issue. Cleo uncharacteriscallyly apologizes to Deuce, who forgives on the basis he knows that "family is complicated". The two reconcile in front of Cleo's family through speaker phone. Cleo goes on a trip with Scaris with her beastfriendss and Toralei. While Toralei is a bother throughout the trip, the ghouls take pleasure in playing tourists. Cleo does not message Deuce while away and is then delighted to see him fly to Scaris and say he nevers wants them to be seperate again. Clawdeen creates a fashion show against Ghostier; a sarcophagus rises on stage and Cleo walks out ontothee catwalk. Cleo dwells in how perfect her life is with good friends, Deuce and her popularity. Seeing Howleen wish for popularity amuses Cleo and the mummy teases the young werewolf. This picks at Howleen until she wishes Cleo to be forgoteen by everyone in school. In a "Nobody/ New Girl" state Cleo becomes friends with content "nobody" Twyla. Despite Twyla's complete disinterest in the social scene, Cleo and she plan for Cleo's comeback. During this memory-wipeout, Deuce flirts with the "New Girl", makingCleo impatient but happy. She is least happy when Howleen takes over her Eclipse Party and blackmails Deuce into being her date. Cleo is wished into Gigi's lamp, there she assists her trapped friendsintheir escape and the defeat in the evil shadow genie Whisp. After Whisp is defeated, Cleo regains her status. She and Deuce share a kiss during the firework show, both glad to be together again. Deuce triestokiss her a second time but Cleo is distracted by the limelight. She shows compassion to Twyla and Howleen in the very end. Cleo threatens to set a plague on ghouls who gang up on Draculaura. Cleo compares Egyptian royalty to vampire aristocracy.Cleo threatens a security guard with her DeNile name in order to get her friends inside the Hauntlywood movie lot.

TV specials
In the Freaky Fusion TV special, Cleo is among the friends who travel with Frankie back to 1814 and meet, unknown to them at the time, Frankie's grandfather, Victor Frankenstein, known by his nickname Sparky, and Hexiciah Steam, Robecca's father. When Sparky damages the time portal before they jump in to return to 2014, due to having jumped in together with Toralei, Cleo and Toralei are accidentally fused together into the freaky fused hybrid, Cleolei, with neither of them having powers that are set off dangerously, but instead they just feud while sharing the same mouth. With help from Avea Trotter and her fellow hybrids who had just transferred to Monster High, Cleolei is able to gain better control of her body, but soon becomes a prisoner of Sparky's Creation 4.0 when it attacks her and the other freaky fused hybrids of Frankie's friends. When Frankie uses her own life force to electrocute and deactivate Creation 4.0, Cleolei is freed and defused back into Cleo and Toralei, but her actions fatally drain Frankie, and she dies soon after.

Using her good times she had with Frankie, Cleo is able to help revive her. Afterwards, she helps finish the play on Monster High's history, and welcomes Avea and the other hybrids to Monster High with open arms.