they are music artists, they all play electric guitars. Urogi is the lead singer and karaku is the background singer, sekdio and aizetsu don't sing. They all have black hair and are brothers. Sekido is the eldest, has red eyes and is mean/stern a lot. Karaku is the second eldest, has green eyes, can be mean/stern something and is pretty flirty. Urogi is the second youngest, has yellow eyes and is always joyful but can still be mean sometimes. Aizetsu has blue eyes, is quiet and a bit shy.