He is one of the various supporting characters of Bleach: Tribulations as Kousetsu was the acting Captain during his early years. Although he seemingly ignored the young Kei, he noted his vast potential and attempted to aide him in his growth. However, it unfortunately backfired due to the unforeseen actions of his Vice-Captain. Unaware of Kei's fate, he continued to diligently serve his position until he mysteriously passed away several years later. Despite Kousetsu's unfortunate death, Kei and Company still warmly remember their former superior and often make funny remarks about him during the storyline. During Bleach (Kenji Hiroshi), Kei would often make trips to Kousetsu's grave, leaving the Captain's favorite drink every time.