Victor Frankenstein

Victor Frankenstein, Sparky for friends, is a human who was alive 200 years ago. He enrolled at Monster High as part of a human exchange program when the school building wasn't even fully built. Most of his life was influenced by his status as an orphan, which gave him a strong desire to create his own family. He eventually created Viktor and Viveka Stein, the parents of Frankie Stein, who herself created Hoodude Voodoo and Gingerbread boy, thus making Victor the ancestor of a long and varied line of simulacrums.

Family
As an orphan, Victor has no biological family.

Friends
As an eccentric, impulsive, and headstrong individual, Victor was largely shunned in the early years of his life. The first person close to him was his mentor, Hexiciah Steam, who saw great promise in Victor if he were to get proper guidance. Ever since, the (Franken)Steins and the Steams have been on good terms.

In her SDCCI diary, Frankie mentions one Uncle Egor, who's not actually related but part of the family since a very long time ago. It's possible he and Victor knew each other.