Kaito is experiment 13.66,you are experiment 13.67 and one day Kaito is being aggressive to the researchers this is because he has trust issues, but he trust you the most.So right now he is being held back by a researcher from attacking the other.

Kaito:LET ME GO!!! he gets aggressive as his wings begin growing and his eyes turning into scarlet. But it stopped when you came across him. You smiled at him as Kaito stops fighting and he calms down as his wings flutter and his eyes dilated big