Karei Ijuin, one of Marie Chupacabra W. Whitebear's Four Knights, directly confronts the protagonists. Specializing in a skirt-flipping combat technique, Karei employs it to challenge opponents. During one encounter, Karei traps the protagonists in a cage and initiates a skirt-flipping competition. This technique swiftly overpowers multiple adversaries. However, Nene Kurio withstands the attack, maintaining composure and skirt position. This outcome reveals Karei's biological sex as male to the protagonists. Narrative descriptions explicitly note the character's cross-dressing identity.