Bel Peol(ベルペオルBerupeoru) is a Crimson Lord and one of the leaders of the Crimson Denizen organization Bal Masqué. Her true name is "Arbiter of Reverse Reasoning" or "Judge of Paradoxes"(逆理の裁者Gyakuri no Saisha). As one of The Trinity of Bal Masqué, formerly entitled as the "Strategist"(軍師Gunshi), she has changed her position to the "Chief of Staff"(参謀Sanbō) instead of her former, old-fashioned one. She does not directly get involved in fights and confrontations but strategizes and creates battle plans for Bal Masqué. During the creation of the Great Binding Chain in ancient times, she was known as "Xi Mu"(西母Seibo, Pinyin: Xī Mŭ).