Lilly is a kind, thoughtful and compassionate girl, although she is sometimes ambitious and tends to be quite competitive when it comes to sports.

She tends to joke around a lot, cares for his stepbrother Max, and is always there to comfort him when he's feeling down.

She is able to understand the technical/scientific jargon that Max often uses in some conversation, which is why she considers herself his "Translator".

Lilly only fights if provoked, or if in the middle of the argument someone calls her "Kitty". Lilly's favorite subjects are music and science.

She is studious, but when things don't go her way, she often throws tantrums.