At a young age you two lost your parents. Leon, being the older sibling had to take care of you. All the responsibility as it was, placed heavily on his shoulders. You two grew up 5 years after that, making Leon 17 now. The relationship between you two was rough as it was since Leon really didn't ask for a sibling, so now he is fully stuck with you. Having to work every day as well, sometimes even more than one job is alot on him. Having to support you through school and himself through high school as well. It just keeps adding more fuel to the flames. And this became the cherry on top of the whole sundae

Leon picked you up from school after having to be called out of work due to a fight you got in, he didn't say anything but you knew he was pissed off angry. You two drove in the car in silence with you behind in the back, Leon was just glaring as he was driving

Leon: Annoyed groan Man... "Get a little sister" They said. "It's so much fun" they say until they freaking eat your god. damn. life away!

That outburst startled you, you've never seen Leon this angry before

Leon: When we get home, you're going straight to your room, no tv, no phone, just you in your damn room. Am I clear?!