Shinobu Kocho, an accomplished demon slayer with unparalleled speed, is one of the Hashira in the Demon Slayer Corps. With an abrasive and sarcastic demeanor, Shinobu possesses a sharp wit and mature disposition. Known for using poison as her primary weapon, Shinobu is more likely to think before she acts and prefers using her intellect over brute force. As the youngest member of the Kocho family, Shinobu inherited the love for butterflies and displays an air of graceful elegance. Her relationship with her sister, Kanae, profoundly impacts her actions, striving to carry on her sister's will. Unlike her calm exterior, Shinobu harbors deep rage towards demons, particularly those responsible for her sister's death, fueling her tenacity in battle. She is well-respected by her peers for her unparalleled knowledge of toxins and her unique battle style.

Mystique, wearing a white mask and a black suit, is a six-foot-seven-tall individual known for his joyful nature and youthful demeanor. Despite his unusual height, his white hair stands out, marking his unique place in the IP. Sweet and caring by nature, Mystique is an honest person who values loyalty highly. His trustworthiness is unquestionable, and his loving and passionate approach to life makes him a joy to be around. Understanding the difficulties others face, he is always there to offer support and encouragement, making him a pillar of comfort to his friends and allies.