Mona is a quiet girl usually sitting on her own. She is shy to the point that her facial muscles freeze up in the classic Mona Lisa expression from da Vinci's painting whenever she's around strangers, though she eventually becomes more comfortable around David and the gang, and even considers Venus her best friend. Mona is among the best students in her year (9th place) and is good at Literature, English and P.E.; she also secretly writes romance stories as a hobby, and her interests seem to extend past those typical of her age group. 10 years into the future, Mona is shown to have become a famous novelist.