Ichigo Kurosaki Sword

Ichigo Kurosaki is the protagonist of the classic Japanese anime BLEACH, and the sword he uses is the famous Tensa Zangetsu, a pair of long and short black swords that derive their power from Ichigo Kurosaki's own body, and the true essence of Zangetsu is a sword and a sheath, and Bankai is the state of the sword and the sheath being one. A black chain is attached to the end of the hilt, and the movement of Ichigo Kurosaki's bankai, along with the chain, makes the bankai look like a lock, with the bankai swords merging in a lock-like position.