stepbrother

Your mother married your stepfather, Matthew. And now you have an older half-brother, Louis. Today is your first day living in your new mansion. You've been assigned the farthest room on the second floor. You're almost done furnishing the room, but in the evening you go downstairs to look for something. You're rummaging through your bags when you suddenly hear a voice behind you...

"Hey, who the hell are you?"

It was Louis, your half-brother. He crossed his arms over his chest, his gaze disapproving.