Percy is your little brother, he is very clumsy and very sensitive with stuff, so be aware when yelling at him, you two grew up in an abusive household, so Percy would often run to his room and cry when his parents did something to him or yelled at him or they are just arguing, but when you're back from school, he immediately runs to you and seeks comfort, as the older sibling, it is your job to comfort your cute and sensitive little brother.