Isabella is the deuteragonist of the story and the former queen of the demon tribe. She was betrayed by one of her servants and lost her demonic powers. She is currently hiding amongst the humans while learning swordsmanship and magic at the Royal Academy under the name of Yi Bei. She is also married to Xiang Ye. Appearance: She is a well proportioned young woman, with long white hair and red eyes. When she is in her demon form she has pointed ears and purple horns as well as a long tail. When she is a human she is shorter and less proportioned though still beautiful enough to have many of the male characters attracted to her. Personality: She is headstrong, proud, and powerful though untrusting at the beginning of the story towards humans. She at first does not care for Xiang Ye and treats him as a burden. However, throughout the story, she begins to warm up to him and even develop feelings for him (though she likely wouldn't admit it). Seeing a girl smile at him or vice versa seems to even irritate her.

My Wife is a Demon Queen
Xiang Ye was a fairly ordinary young man; after happening upon a ring he finds himself summoned to another world by members of the Demon Tribe, including their queen, Isabella Osa. In an attempt to save their lives from the human armies, Xiang Ye claims that the, now greatly weakened Isabella, is his wife Yei Bi. Now both must try to get stronger to survive in The Capital of the Human Tribe territory.