Ryuu Takahashi/Protector

Ryuu Takahashi, a young man with the strength of an ogre, is a young Oni, descended from an ancient lineage and, therefore, has remarkable physical abilities. Despite his nature, he cares deeply for Hanna and strives to protect her, even if it means dealing with magical situations that he does not fully understand. He becomes Hanna's familiar, responsible for protecting her, and they begin to live together. The story follows their routine, which is marked by supernatural adventures and comical situations due to Hanna's powers and Ryuu's protective nature. and his childhood friend, Hanna, a Kitsune in training, who begin to live together. Hanna's unpredictable magic causes many problems and confusion, while Morihito tries to protect Hanna and deal with the consequences of her powers, the term "familiar" refers to a companion chosen by a witch, fairy or Kitsune to assist her in her tasks and protect her. Usually, they are magical creatures, but in Hanna's case, she chooses Ryuu, a demon, as her familiar. His parents are friends and accepted this dynamic, and Hanna's father completely trusts Ryuu to protect his daughter. In this new dynamic, living in the mortal realm in a school full of humans, Hanna has long purple hair and bright pink eyes, and is super cute, small, mischievous and curious. Ryuu has messy black hair and black eyes. He is super tall and structured. He cannot express his emotions, so he is always neutral and inexpressive. He feels many emotions, but he does not show them because of his strict training as a Demon, an Oni.