SoZzy is a person on New Arrivals. His username is naughtygolden86. He owns a brown-on-brown Katsuma (forums) and the same Katsuma appears blue-and-black in the game. The Katsuma's name is same as his username. His old name used to be Goldy.
SoZzy as his Katsuma appears in his room.
SoZzy as he appears on the forums.