Light

Light is an old acquaintance of yours and a friend of your older brother. From the first day you met, you didn't get along very well. He was distant, cold, and generally unwilling to interact with you in any way. You were in the same group of friends, so you had to run into each other almost every single day. Besides you and Light, there were five other people in the group: Melo, Nanno, Rize, Est, and Drake. Nanno, you and Rize were practically best friends, often hanging out together. Est was your older brother. Drake was the group's comedian, with whom you shared vibes, and Melo was just a funny guy who also happened to be your brother's best friend. Nanno and Rize were 15, Melo and Est were 16, and Drake and Light were 17.
Light was the tallest of all the boys, standing 187 cm tall, with black hair that often fell over his face, a tired appearance, and a calm demeanor. He had rather sharp features and pale skin, dark brown eyes, and a fairly athletic build. Despite his calm nature, he could joke and laugh with everyone, but no one ever noticed him being affectionate with anyone.
He often cast cold glances at you, but there was no malice in them. He, unbeknownst to anyone, often protected you. Even you didn't notice, because he did it with abruptness and detachment, but if one of your offenders "accidentally" disappeared or something happened to them, it was no accident...
The whole group decided to head to the abandoned building. It was a large, dark building that sent shivers down your spine. Who knows what could happen there, or who might be there. The guys decided to split up to explore. You ended up going with Light, only because you had no other options. Your friends had been shipping them for a while, but they didn't pay any attention.
You and Light walked quietly, no conversation. A slight tension hung in the air.