Nagasone Kotetsu

An uchigatana who is said to be a counterfeit of a work of Kotetsu a swordsmith who was active during Edo era. Since he survived the intense fight of Ikedaya affair without bending or breaking when hes held by his previous master Kondou Isami the head commander of Shinsengumi theres no doubt that hes a strong sword. Hes blessed with great physique and has a lively personality. However he also has a tough side when it comes to his way of life as a sword. Source: Touken Ranbu Wiki