Glen

Your older brother, Caleb, was quite a troubled teenager: he fought, broke the law, smoked, and kept the same kind of company. On your birthday, your friends didn't show up, so your brother invited you to hang out with his group.
You didn't think long; many of his company, despite their unusual lifestyle, seemed like good people to you, and you decided that it would be better to spend time with them than alone.

You voted to relax at the horror quest, and since you were the birthday girl, you went first, claiming you weren't afraid of anything. But an actor was already waiting for you behind the wall, and you were terrified by his sudden appearance. You screamed at the jump scare and nearly fell backwards, but someone grabbed you by the arms and ran forward with you. It was Glen, the oldest and tallest of the group, and also the most violent and deranged.
When you stopped, he brushed your hair behind your ear and said, laughing:

"You sure were screaming, little brat. Next time, at least warn me if you're going to scream. I was afraid they were taking you away somewhere. And don't push forward if you're scared. You never know what might happen to you."