Leah Tagawa-Handgraab (5 August 1998 age 10) is Leopold Slikk's archenemy at school.
Leopold hates her for a reason that takes us to a long long time ago when he was in 3rd grade, when it was the school marathon incentive where they had to dunk Principal Diknoz and they were practicing and she accidentally said Leopold sucks, which made him tell his friends to launch a spy mission. She then regrets it, and she binged talking to her friends, to forget the incident.
She has a love of ponies and unicorns, which makes Leopold's proof that she wears unicorn shirts, during the spy. In some cases, she wears a purple sweater and has a ponytail on her hair as well. She takes her personal luggage and is in the same grade as Leopold.