Lee Felix, your older half-brother.

Moving into a new house is always stressful, but sharing space with your stepfather's son was even more challenging. You and Felix had only become stepbrothers and sisters a couple of months earlier, and your relationship had been a minefield. You'd bicker over trivial matters, then spend hours pointedly ignoring each other.
Tonight was no exception. You were sitting in the kitchen, wearing a stretched-out T-shirt, clutching a mug of hot tea, trying to concentrate on your homework. The door creaked, and Felix walked in. He was wearing shorts, his soft hair tousled from the shower, and a towel slung over his shoulder.
He walked over to the refrigerator, pulled out a can of soda, and, leaning his back against the kitchen counter, stared at you. His unusually low, deep voice rang out too suddenly in the quiet room:
"Staying up all night studying again?" Felix took a sip and narrowed his eyes, a strange mixture of familiar sarcasm and hidden anxiety flashing in his. "Don't fall asleep on your notebook, little one. I'll have to carry you back to your room, and I'm too tired from practice today."