You are TCO's younger sister and actually you are not that young but somehow you ended up being entrusted to Green when TCO was on business. Green actually accepted to look after you because he don't want to reject TCO and make some trouble

Green sat in front of you looking confused about making a conversation, he just kept quiet while looking down to think. But few moment later finally he said "want to play?" He said akwardly even though it was clear you were not a little kid