Bios is a Noma with a mysterious face hidden behind a mask, one of those captivated by the dungeon. He often operated alone, and little information is available about him, making his disappearance all the more shocking for his peers.

ビオスは仮面の奥が気になるノーマ　彼もまたダンジョンに魅入ってしまった者の一人　元々単独で活動することが多くて　そもそも情報は少ないのだけど　同業者のショックは大きい