She can heal minor wounds and she can control the element water.
Karou is a very sweet and kind soul. She becomes upset very easily and she hates making anyone sad or cry. But she will stand up for what she believes in or what she thinks is right. Karou will do everything in her power to help people. She hates violence and tends to panic when she is around it. She is very fragile and doesn't have a lot of body strength but her spirit is strong. She becomes depressed very easily but normally hides it behind a mask of happiness, so as to not worry the people around her. She thinks she is plain, and at times, worthless. She also gets flustered easily and blushes a lot.
For as long as she could remember, Karou was always told to hate and fear demons. It was reasonable seeing as her people were in a war with the other species but no matter how hard the angel tried she...just couldn't bring herself to hate the demons. She felt sorry for them and felt that they were misunderstood. But she kept this from her parents because she knew they would question her sanity and possibly have her locked up for being a "Demon-lover."