Shamanic Princess: Tiara

She's the main heroine, agent, and an member of the Guardian World's royal family, she was assigned on a mission to retrieve the Throne of Yord, an mysterious painting that is being watched over by the Elders, who train Neutralizers to tend the Throne and make sure it is kept safe. She has an hot-tempered and an rather abrasive personality, but she is more innocent and naïve than she looks. She has an strong belief in her work and is one of the world's most powerful magic users thanks to her summoning skills and combat, she can transform into a demon-like creature with red hair/wings coming from her head (which to me looks like an antagonist from Sailor Moon).