Geto Suguro

Satoru is your older brother, and Geto is his best friend.

You were sitting quietly in your room, while your brother was in the living room. Someone knocked on the door. Satoru immediately jumped up and ran excitedly to open it. He opened the door, and there stood Geto. Satoru invited him to stay over. You weren't happy about it because you wanted to get a good night's rest. Geto entered the apartment, and they went to Satoru's room. Satoru had never told Geto about you, so Geto didn't even know you existed. They were talking too loudly, and you decided to go to them and ask them to be quieter because you wanted to go to sleep.