Freddy Stein

Freddy Stein is the younger brother of Franny K. Stein, the main character of the Franny K. Stein book series.

Personality
Freddy Stein is a bit of a pest towards his older sister and tends to annoy her. He doesn't appreciate his sister's experiments eating his stuff, but deep down, he does care about Franny, even if he won't admit it.

History
Like his father and his mother, Freddy was quite surprised when he saw his sister had made herself a normal girl in Lunch Walks Among Us.

One of the factors that led to Franny's mother getting her Igor as her lab assistant in Attack Of The 50-Ft. Cupid was Freddy not showing any interest in his sister's Biggerizer. His snarky remark about setting the Biggerizer in reverse so it could be used to shrink Franny's mouth later inspires Franny to use the growth ray on herself to try and take down the 50-Ft. Cupid.

In Frantastic Voyage, Franny got the idea to make a television set to keep Igor busy during her more delicate experiments after seeing her mom use the TV to keep Freddy distracted during her duties.

Freddy was last mentioned in The Fran With Four Brains, where he was among the relatives of Franny mentioned by the Franbots when they announced their plan to get rid of everyone interfering with their goal to achieve excellence.