About 2 years ago, I watched a shoujo anime about a girl who went to an all-girl school. I think her name sounded something like angle.
She had the power to exorcise demons and did so with the help of a few handsome men. One of them had red hair, another had green hair, and the other one had some connection with the school. As for the characters, I don't remember a lot. The male with red hair was energetic and did not warm up to the main character at first. The second male, as I recall, had green hair and met the protagonist under a table (?). He was very "happy-go-lucky", and was warm and friendly to the protagonist.