Part one: [link]Some Points explained
+Leo's parents are separated, his father left when he was around 5, but after a few years they had a final closure between his father's side and Leo's grandma/father's family moved back in japan. Leo was left with his mother who is very strict and very controlling. as a kid, Leo believed on what his mother said about leaving and being obedient because he didn't wanted to be left out again.
Leo grew to develop a 'codependency'; to be obedient and do what ever people asked him to do, and it would be something even he has doubt and could not decide for himself and the fear that people would abandoned him. (reason why his persona was a titan because I conceptualized him a 'soldier' who could not act out by his own.)
+Jake lives by the neighborhood and the one who introduced Eskrima (Leo's fighting method) and was his first actual friend. they have been friends for 6 years but leo was really secretive and acts differently when its comes of his life outside school and from his home. in comparison about the 'room' the other side is brighter compared what's inside it reflects how Leo acts towards to people, Outside he would be really sociable and pleasant but deep inside he has much anxiety he keeps from himself that he got from schooling and the pressure he gets from home. and the moment when leo slowly to open's up to his friend, Leo instantly felt that side from him was not easily accepted by Jake. especially when Jake decided to enroll in his last year in middle school with Leo, there Jake discovers the contrast of Leo's personality from what Jake know and how Leo acts up in school, being an 'agreeable idiot'. the tension built up until their graduation and leo got his message from jake. Leo got angry in some point for he thought Jake would understand but it comes out that they became strangers after knowing Leo's secret.
+Leo feeling 'it was a mistake by not following his mother''
because he lost a friend and Miki-chan (his grandmother in his father side) because leo slowly tried to work things by his own and it was also part of his idea to move on, despite he actually losses things. Leo really didn't changed that much after because he was still withdrawn of opening himself to others until it was too late for him again.
+about the things he hold to himself
+Killing his heart