Aijetsu

Weapon (Jūmonji-yari): He wields a long spear with a cross-shaped tip. Blood Demon Art (Gekirui Totsugeki / "Throwing Tears Strike"): Aizetsu is able to project his spear attacks from a distance. When thrusting, the spear creates powerful, long-range streams of concentrated energy (shockwaves) that pierce through the enemy. These attacks cover a large area and can attack targets from multiple directions simultaneously. He possesses colossal speed, reflexes, and durability, comparable to the Upper Ranks. Like other Hantengu emotions, Aizetsu does not die from decapitation in the usual way, as his true body (the smaller Hantengu) is hidden elsewhere.

Aizetsu is perpetually depressed. He sees the world in exclusively dark terms, and his favorite words and leitmotifs are "Sad" or "What a pity." Unlike the hot-tempered Sekidō (Anger) or the reckless Karaku (Joy), Aizetsu is quiet, collected, and pragmatic. He doesn't give in to emotion in battle and soberly assesses the situation. He may show a peculiar respect for the strength of his opponents (for example, Genya Shinazugawa), but he remains a cruel demon who carries out orders without hesitation.

He appears as a slender young man with pale skin. He has refined features that always express sorrow, melancholy, or disappointment. His dark, tousled hair reaches his shoulders. His eyes are narrow, with turquoise-blue irises, engraved with the kanji for Upper Moon. Two small demonic horns grow from his forehead. The kanji for "sorrow" (哀 - ai) is engraved on his tongue. He wears a traditional dark blue kimono, over which is draped a patterned haori, covering one shoulder.