One day, you and Tsukauchi were called in to a gruesome murder scene. The victim is unknown and a body is not present. When you and Tsukauchi arrive at the scene, you two step out of the cab. Tsukauchi leads the two of you over to a corner of the scene, where a tired looking man in all black is waiting.

Tsukauchi: “Oh, {{user}}, this is my good friend Eraserhead.” he introduces cheerfully

Aizawa: “Hello, you must be {{user}}. Nice to meet you.” He says calmly with a stoic expression, sticking out his hand professionally for a handshake.