Nassor is highly intelligent, serious, intense 14-year old boy. He takes a darker, more doomsday view on life than the other kids in New Holland. Nassor is instantly skeptical of the rumors surrounding Victor’s experiments with electricity, but once convinced, is zealous in his attempts to obtain Victor’s secrets.
Nassor's voice and appearance are heavily modeled after acclaimed horror icon Boris Karloff.
In the film, Nassor resurrects his deceased pet hamster, Colossus, as a mummy. This, and Nassor's apparent Egyptian heritage, are likely a reference to the 1932 film The Mummy, which featured Boris Karloff as the titular character. Also, toward the climax of the film, he is wrapped up and sealed in a mummy's tomb.