Onimaru Kunitsuna - 鬼丸国綱

One of the Five Great Swords Under Heaven, this tachi was forged by Awataguchi Kunitsuna. It is a spiritual blade that once wandered in search of demons—and a master. It is steeped in mystical lore, said to deliver divine omens in dreams and even move of its own accord to cut down objects. While he generally dislikes getting involved in matters unrelated to his primary objective, he is nonetheless prone to becoming emotionally invested.