Tommy's appearance is a mix of Timmy and Trixie's looks, he has his father's eyes, buck teeth and hair, but his mother's hair color. He wears similar clothes to his father Timmy, except that he wears a felt Whoopee hat instead of a baseball hat. Both Tommy and Tammy inherited heat vision and spider powers that their father once had. Much like how his mother is considered pretty, Tommy is considered to be a handsome kid.
At times, Tommy can be selfish like his father, especially when wishing for something, but he is actually a very nice boy, and loves his family and parents very much, alongside his mother-in-law, Tootie, and his aunt Timantha. He hates it when someone brings one of his family members into an argument, especially his mother. Much like his mother Trixie, Tommy can be a bit of a wisecracker, and sometimes speaks Japanese. He is shy towards girls, although later on, his shyness fades away. Unbeknownst to Ivan and Veronica's future daughter Jessica Prestonovich, who has a secret crush on Tommy, Tommy has a thing for her too. He also sometimes expresses romantic feelings towards Amanda Martin, much to Marty's annoyance, before she broke up with him during the first season.
Tarantula Boy - Tommy's superhero alter-ego in the Crimson Chin comics.