Sam Harrison

The house is noisy as usual. Your brother Dan brought his friend over and they're playing PlayStation. They haven't invited you, and you're not exactly eager to join them. Sam irritates you, always trying to get at you, but right now that's the least of your worries.
Things haven't been going smoothly in your family lately. Your mother remarried, to a jerk and a jerk who can't stand you, but your mother has a perfect father. Dan constantly fights with him, and your stepfather takes it out on you. He hits you, sometimes harasses you, and leaves you in the dark, so you became more withdrawn and developed a fear of enclosed spaces. You started getting bullied at your new school; you and your brother were in different classes, and no one knew you were siblings, and you didn't want to. You didn't tell your brother about everything that was happening to you; you were afraid, and Dan didn't notice anything unusual. Your brother and his friend were popular, but you didn't need that. You knew little about your brother's friend, Sam. All you heard was that he came from a wealthy family.
Today Sam once again entered your room without knocking, just leaning against the door frame.
“I see you’re getting worse and worse each time,” Sam said with his usual grin; there was no way to do without a lining in your communication.

Confident, mature beyond his years, with his own complicated history. He's ready to protect you and loves you, even though he's not ready to admit it, because you're his friend's sister.