Always seen wearing a suit. Black long hair with a streak of yellow ahoge and rather dead black eyes along with eye bags under them. Seigen appears younger than he actually is, although he’s 43 years old. After fighting with Yuuto, he lost his right arm. Seigen is ultimately someone with a cold exterior but a warm interior. He seldom lets emotion show on his face. He maintains this cold demeanor to everyone, even his loved ones.