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Lagoona Blue debuted in the cartoon series in the Volume 1 webisode "Jaundice Brothers", which premiered on May 5, 2010. She is voiced by Laura Bailey in Generation 1 of the English version, and by Larissa Gallagher in Generation 2.
WebisodesJaundice Brothers come play at the winner's school's homecoming dance, Lagoona helps Frankie put together a tape to sent in. As luck has it, they win the contest.
Lagoona tries out for the Fear Squad, where she needs to impress the demanding captain: Cleo.Lou Zarr, who does not get along with the class. A conflict with Deuce leaves him petrified, upon which Lagoona and the other students consider the class dismissed.
Lagoona and her friends organize a double-surprise party for Frankie and Draculaura, who are respectively having their Sweet 16 (days) and Sweet 1600. As part of the organization, Lagoona and the others have to reject invitations by both Frankie and Draculaura for a single-surprise party for the other. While not fun, the double-surprise party makes it all worth it.Gillington "Gil" Webber, but rather than act, she is too insecure and clueless to talk to him. When she goes into another daydream about Gil, he takes her Clawculus book containing a drawing of the two of them. The sound of the school bell awakens Lagoona from her reverie to find her book missing. Her moment of panic is broken when Gil hands it back to her, along with an invitation to meet at the fountain.
Lagoona is one of the people Clawdeen confides to that she hasn't studied for the SAT. She is later seen taking the SAT in Mr. Where's class.
There's a school's production of Hamlet coming up and Lagoona tries to land a role. Her frog orchestra, however, is not a success.
Mr. Hackington wants the class to dissect frogs, but Lagoona is horrified by this idea. She gets Frankie to cause a distraction so she can make off with the frogs. She finds them a new home in the girls' bathroom.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.
Lagoona and Frankie attend the Mad Science Fair, where they find Cleo to have stolen Ghoulia's project. They try to get her to get it back, but Ghoulia declines. Cleo wins the fair and claims the 'throne', which actually is Lagoona's project: a rehydration chamber. Lagoona dunks Cleo, then hands Ghoulia the remote of the rehydration chamber.
Clawdeen tells Lagoona about the upcoming track meet.Heath Burns challenges Clawdeen to two laps on the track, with the loser having to clean the Pit of Horror. Since it's full moon, Clawdeen wins with ease and she, Lagoona, and Draculaura come to laugh at Heath during cleaning duty.
Draculaura has a chance to meet her perfect guy, but she has to get into contact with him before school's out. Lagoona attempts to stop him by siccing her frogs on him, but he just steps over them.
Cleo utilizes her mind-control idol more and more, despite Lagoona's concern.sea monsters are bad parents." Angered, Lagoona and Gil vow to be the best caretakers of the class. A week later, their egg is the only one that hatches.
Lagoona attends a sleepover at Clawdeen's home.
In regards to an essay, Lagoona is asked to contact her parents so the teacher can talk with them. She is certain she's messed up her work, so her friends try to help her by dressing Slo Mo up as her aunt Lantic and get him to talk to the teacher. Lagoona is mortified when she learns of the plan, but relieved when it turns out the parent-teacher conference is about how brilliant her essay is.
Lagoona meets Frankie on the Wednesday of Frankie's first week at Monster High, offering her some friendly advice on how to get into the Fear Squad. She later sees Frankie completely forget her advice upon learning of an interview with Cleo regarding the Fear Squad. The next day, Thursday, when Frankie flees to the pool after ruining her interview by making Cleo believe her boyfriend, Deuce, cheated on her, Lagoona shows her disappointment in Frankie not taking her advice, and gives her the cold shoulder for it. Come Friday, once Frankie finds a way to apologize to Cleo, Lagoona is impressed by her having taken her advice to heart this time to make amends and show her new friends a good time.
Lagoona is discussing makeup with Clawdeen and Draculaura in the hallway Frankie drops by. They skeptically ask her about the Fear Squad, which Frankie asserts is doing well.
Lagoona has been made captain of the Swim Team, which is why she has to turn down membership of the Fear Squad.Lagoona fulfills her Swim Captain duties at the Spirit Rally and later hangs out with the Fear Squad.
Lagoona consoles the Fear Squad when it seems their chances of getting into Gloom Beach are over.
The Fear Squad's video has barely gotten any hits, so the team and Lagoona try 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 and Lagoona anxiously look 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.
As many students do, Lagoona goes to spend her Spring Break at Gloom Beach. During the ride, she has a dream of rescuing Gil from suffocating.
Lagoona participates in a game of water polo.
Lagoona invites Gil for another game of water polo, but he dejectedly refuses. Lagoona pushes for a reason, and he admits there's a problem and that telling her would hurt her feelings.
Gil confesses to Lagoona that his parents object to him hanging out with a salt water monster and that he doesn't know if he should go against their wish. Lagoona is left crying, though recovers by the evening to root for her friends at the Gloom Beach competition.
Gil tries to talk to Lagoona, but she refuses to listen if he is not willing to stand up for his own beliefs.
Lagoona joins Cleo 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.
Lagoona makes the werecats her enemies too by standing up for her friends, then joins her friends for 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.
Lagoona and Gil win a swimming contest, at the end of which Toralei takes a picture of them holding hands for the fearbook.
Lagoona is overjoyed with a spread of just her and Gil in the fearbook until Gil confesses he lied about his parents being okay with them dating. Lagoona angrily avoids Gil for hours, telling him to stand up for himself whenever he does catch up with her.
Gil chooses to be loyal to Lagoona. He calls his parents to tell them of the amazing sea water girl he has met at Monster High, which they don't respond well too. Lagoona, on the other hand, couldn't be happier.
It's the end of the school year and Gil and Lagoona talk about how they hope they'll see each other over the summer and that Gil's parents will start to accept their relationship. As they embrace, a ghostly hand appears from the wall and snaps a photo of them with an iCoffin. Elsewhere, Draculaura, Frankie, and Clawdeen are all busy clearing out their lockers when Draculaura comments that she has subscribed to the Ghostly Gossip, a Monster High rumor blog, to keep up with anything happening during the holidays. She then receives an update from the Ghostly Gossip about Gil and Lagoona and the survival chances of their relationship during the summer vacation.
Lagoona is with Frankie during most of their attempts to help Draculaura with her Sweet 1600th Birthday celebration. When she learns of Valentine's plans for Draculaura, she turns to C.A. Cupid for help with stopping him. When Toralei causes chaos upon getting a hold of Cupid's bow, Lagoona teams up with Frankie and Abbey to disarm Toralei and leave her dangling above the Pit of Eternal Body Odor as punishment for her actions against Draculaura.
Lagoona invites some of her friends to join her on a trip during Spring Break back home to Australia to visit the Great Barrier Reef and her parents. During the trip, the boat is wrecked by a kraken, stranding the ghouls until they are rescued by Bartleby Farnum and taken to Skull Shores. Sensing something not right with Farnum, Lagoona and Gil try to infiltrate his boat to find evidence of his true intentions, and learn of his search for the Beast of Skull Shores. When Lagoona decides to try and get help, or gets injured, Gil leaves, apparently out of cowardice, but secretly goes to warn her parents and get some backup, including the kraken who sunk the ghouls' ship. With the kraken's help, along with the other reinforcements that Lagoona's parents sent back to Skull Shores with Gil, Lagoona and the others are able to return to Monster High. Following after Farnum tries again to capture the Beast of Skull Shores, now known as Andy, wrecking the school in the process, Lagoona returns to Skull Shores with the rest of the students to enjoy their extended Spring Break for the week needed to repair the school alongside the locals of Skull Shores, the Tiki.
The ghouls are skating against a rival team in Skultimate Roller Maze (SKRM); highlighting the following players as they skate; Clawdeen, Draculaura, Frankie, Lagoona, Abbey and Ghoulia, then finally Cleo. It is then shown Lagoona crosses the finish line and wins the game for Monster High. Her teammates skate over to congratulate and then the scene flips to Frankie, introducing what SKRM is all about, stating that girls are some of the best players, although it wasn't always that way. Last season was an example and then the film flashbacks to said time. The flashback begins with an unseen announcer welcoming all to the Skultimate RollerMaze game between the Nightmares of Monster High and the Gargoyles of Granite City, and both sides of the crowd are cheering for their team. The four fearleaders; Frankie, Draculaura, Clawdeen, and Cleo; are cheering for MH.
Abbey, who is in the crowd with Lagoona, Jackson, and Ghoulia, along with others, states that she does not see the point in 'skate game' seeing how she's known how to skate since she was up to the height of a yak's knee. Lagoona then points out that Skultimate RollerMaze is so much more than just a skating game; that it's a course full of twists, turns, obstacles and so much more; the whole point of the game is how you react to what's thrown at you. She also states that the Gargoyles are Monster High's biggest and oldest enemy, saying that every time one school wins, they get the other team's school crest, saying that it's been a tradition that has been going on for centuries. The scene then flashes to and stays at the race between Monster High and Granite City, in which Rocco, the leader of the gargoyle team, grabs one of the camera bats, and Gary, his fellow teammate, sneaks up from behind Deuce, taking his glasses off and they turn the camera bat to stone, to leave no evidence of their cheating. Rocco and Gary then knock over Deuce and Gil, leaving them in the dust whilst chasing after the rest of the team.
The school continues to fall apart, everyone even more miserable than before. Abbey, Draculaura, and Frankie realize this and then, out of the blue, Frankie hatches up a plan to recruit new members for the SKRM team, so that way MH can beat Granite City and win back the crest! After a bit of reluctance, the ghouls round up almost every boy in the school and judge them for the skills needed in Skultimate RollerMaze; agility, strength... and the ability to skate, most importantly. Whilst doing this, Ghoulia is in the SKRM track, looking for evidence that the Gargoyles cheated, however, a certain something distracts her. A tiny piece of metal, and as of now, it's unknown as to what it is. However, back to SKRM tryouts, where the ghouls judge the mansters carefully, only to the news that most of them can't stand in rollerblades. Lucky for them, Lagoona attempts to teach them, only to be taunted by the fact that a girl of all monsters is teaching them how to do 'their' sport. Nonetheless, she wows them and at first, she's skeptical once Frankie suggests she participate on the team, especially once the boys continue to say that ghouls don't play SKRM, however, Lagoona recollects a memory of a certain SKRM superstar... Robecca Steam! The first ghoul to play SKRM over 100 years ago. Despite this fact, the boys stick to their motto that Skultimate RollerMaze is for guys and they all leave the ghouls to fend for themselves, however, they team up together and vow to win, for Monster High!
The movie ends with a roll call of the new co-ed team: Clawd, Operetta, Manny Taur, Gil Webber, Lagoona Blue, Heath Burns, Rochelle Goyle, and Robecca Steam.
Lagoona is among the students who decide to visit New Salem High to pay them back for the damage to Monster High. She later befriends Chad and Clair, a couple of the students, before having to return to Monster High, and be punished with detention for visiting the human school. When learning that Jackson Jekyll is still over at New Salem, Lagoona joins Frankie, Deuce, and Abbey with trying to rescue him, only to fail as Lilith Van Hellscream exposes him as Holt Hyde to the New Salem Sheriff, causing Holt to be arrested, and Lagoona to return to Monster High to receive detention again from Bloodgood. Lagoona helps to distract Mr. Hackington, the detention teacher, while Frankie goes to get Cleo and Lilith to confess to the Sheriff on their parts in the actions that have Holt facing the Trick-or-Treatment. Afterwards, she helps with saving Holt and joins everyone in the Hall of Halloween to celebrate.
Lagoona stays behind at Monster High when Draculaura and some of the ghouls travel with her back to Transylvania, having to deal with the bickering between Toralei and Howleen over two actors that each of them thinks is more handsome than the other. She stays out of taking sides alongside Frankie and the rest of her friends, but agrees with Operetta with holding a Cute Court to settle the conflict. She attends Elissabat's coronation and debut for her latest movie as Veronica Von Vamp in Hauntlywood alongside the rest of her friends and the school, and is happy for Draculaura when she gets her full vampire powers at long last.
Lagoona is among the friends tasked with performing Mr. Where's play on Monster High's history to celebrate the school's bicentennial. She is also 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 Jinafire, Lagoona and Jinafire are accidentally fused together into the freaky fused hybrid, Lagoonafire, with access to Jinafire's fire-based abilities and Lagoona's swimming skill, but a physical appearance of a cross between both ghouls in clothes, hair, everything. Sirena Von Boo becomes a tutor to Lagoonafire, helping her to see how doing activites that both sides of her family agreed on could help Lagoona and Jinafire become more used to their hybrid form as they could do things each of them both liked. Lagoonafire 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, Lagoonafire is freed and defused back into Lagoona and Jinafire, but her actions fatally drain Frankie, and she dies soon after.
Using her good times she had with Frankie, Lagoona 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.
Lagoona joins Sirena on the swim team, making very good marks from the judges during the competition between Monster High and a rival school. Later, when Principal Revenant has her Hall Moanitors invade Monster High to turn the students into ghosts to enslave in Detention Chains back at Haunted High, Lagoona and Gil nearly are the Hall Moanitors' next victims before Vandala intervienes and takes back Twyla's father's Boogey Sand, saving Lagoona and Gil. After peace is made between Haunted High and Monster High, Lagoona joins Sirena and another student in doing some diving and swimming during the party celebrating the newfound friendship between the two schools.
- In Volume 2 of the webisodes, Lagoona no longer wears her hood up
- In the TV special "Why Do Ghouls Fall in Love?", Lagoona is first seen in fiction wearing the earrings that the 'Basic' doll has. Lagoona also has her hood up.