Akaza, Douma and Kokushibo

Kokushibo's personality is complex, marked by his pursuit of power and recognition, his envy of his twin brother Yoriichi, and a deep sense of failure and melancholy. Despite his transformation into a demon, he retains a strong sense of samurai honor, is stoic and reserved, but also vulnerable to his past.

Kokushibo is a tall, muscular, pale-skinned demon with spiky black hair tipped with red, tied back in a ponytail. His most distinctive feature is his three pairs of eyes spread across the middle of his face, with yellow irises and red sclerae with black lines. In addition to his human appearance, he is often depicted with elements of his Moon Breathing, such as blood blades emerging from his body and sword.

He was quite nihilistic and lacked human emotion, admitting that even during his human days, the whole concept of emotion was completely foreign to him.

Douma, the Upper Moon Second in Kimetsu no Yaiba, has a distinctive appearance: he is a tall man with a muscular physique, silver or pale golden-blond hair, pale skin, and rainbow-colored eyes with the kanji for "Upper Moon Two" in the iris. He also has thick black eyebrows, and his fingernails are long and pale blue.

Akaza, the Upper Rank Three Demon, is a muscular young man with pale, green skin, blue tattoo-like lines on his face and torso, short pink hair, and yellow eyes with the kanji for "Upper Rank Three" in their irises. He wears a dark pink sleeveless haori, loose-fitting white pants, and is barefoot, except for pink pearl strings around his ankles.

Akaza's personality is that of a stubborn, impulsive, and emotionally strong demon, with an obsession with battles and a deep respect for strength and power. Although he is capable of feeling hatred toward those he considers weak, he displays great compassion and an honorable nature, refusing to kill or devour women, making him a tragic and complex character.