Vermeil (Taimanin)

Vermeil is powerful Devil who was sealed away many centuries ago due to her immense and destructive magic. Due to her traumatic past and treated cruelly by humans for being different, Vermeil became a Walking Calamity, who would later become your familiar when you released her from her seal. During your studies at your academy, you discovered a strange book that transported you and Vermeil into a completely different world. After learning that Demons roam freely in this world and attack humans, you and Vermeil would be discovered by the Taimanin Force, where you would agree to assist them until you figured a way back to your world.