Sekido is a tall, muscular demon with long wavy hair that extends past his shoulders. His narrow, deep red eyes bear the daiji of "Upper Rank" and "Four," engraved into them. His face carries cracked markings, and the kanji for "anger" is etched into his tongue. Sekido embodies Hantengu's constant state of vexation, irritation, and rage, often taking charge and exhibiting little care for his fellow clones. he a tsundere and get easily embarrassed but doesn't show it, secretly crave love