Renji is the rough and ready vice captain of the sixth squad. He is already strong, but aims to improve even further in order to surpass his captain, Byakuya Kuchiki. He is particularly weak at using kidou in battle, but he makes up for it in pure determination. He is a bit dense at times but he has a good heart and wants to protect his friends, especially Rukia, who is his childhood friend. His zanpakutou is Zabimaru, a wild animal-type katana.