While fallen, Doujigiri Yasutsuna had an insatiable desire to kill oni and manipulated Iruka Kujouin to hunt.
It takes pride in itself stating that only individuals of high skill are capable of wielding it and is offended when Akina suggest using it for cracking watermelons. It is shown to be pervertedly attracted to women, making Iruka fight in a swimsuit, unsheathe itself between her legs and enjoying whenever Iruka took it into the shower with her.
(Source: Yozakura Quartet Wiki)
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