One of the Three Great Spears, a spear made by Fujiwara Masazane of Muramasa school. On the blade's inside part, there are beautiful Sanskrit characters and trident drawn. His name comes from an anecdote where a dragonfly that landed on top of the blade was instantly cut in two. Although he's big, he has simple and sincere personality.
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: About Tonbokiri, of course there's the strength, but my first impression is that his posture seems beautiful. "I should draw it out somehow," I thought while performing him. I thought, "Well, because of his kindness and tolerant personality, he cannot bear to turn down those who rely on him, so maybe that's his weak point..." and stuff.
Q: Tell us about any happenings around you lately that feels like "Hanamaru".
A: It's definitely the fact that I'm allowed to do 3 characters in Hanamaru!! I did it!!