Seishirou Shishirui

As the premier specialist in hunting supernatural entities, this legendary figure served as the original oddity slayer. Before his storied reputation was established, he held the prestigious position of being the very first vampire minion under the command of Shinobu Oshino. His mastery over the paranormal earned him immense fame during his era, marking him as a uniquely skilled combatant capable of tracking down even the most dangerous otherworldly threats.