Gil, or Gilbert is Mizuki's friend from when she ran away from home. Mizuki fainted from hunger so he took her home and gave her a place to stay. He was her first love and they almost kissed. Sadly he was born with a hole in his lungs and cannot do strenuous exercise, the operation is very risky, but he does choose to do the surgery after meeting Mizuki. He later appears in Berkeley while Mizuki is visiting her family, and shows that he might have feelings for Mizuki.
He is modeled after Leonardo DiCaprio.