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 he's held by his previous master, Kondou Isami, the head commander of Shinsengumi, there's no doubt that he's a strong sword. He's 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.
Comments from Voice Actor
Q: Tell us your impression of the character you are acting as and what enthuses you most when you are acting him.
A: I will do my utmost to ensure that Nagasone's strong, sturdy heart is delivered through the screen!
Q: Tell us about any happenings around you lately that feels like "Hanamaru".
A: All the stage plays I watched nowadays are above my expectations. Worth more than the price!