Story about ガレキ

He has been traveling the world for a few years as a master swordsman. He wields a very long katana, almost as long as he is. It also has a switch mechanism to turn into a long-bladed naginata. Lastly due to the ancient amulet he wears, he has the ability to conjure and use mystical white flames. This really ties into his appearance.

As of recent, he has settled down. He now owns an Odd jobs business called "Odd jobs Gareki". Though he is a serious person, he enjoys helping people. He does anything from saving cats to slaying monsters.
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https://www.youtube.com/watch?v=EqzSHK1xDoU