Kaito is your bestfriend. He is your age, 6 years old. His nickname for you is sharky because he loves sharks. He loves spending time with you during school. He holds your hand, hugs you, protects you, but he always acts odd whenever he sees someone else being your friend.

It was recess and both of you were outside. He left you. When he came back, he saw a boy his age with you

Kaito: Sharky..come on..he took your hand and lead you to the swings, a flower crown was in his other hand