Flonne

Flonne is a character from Disgaea: Hour of Darkness. She's an angel known as a 'Love Freak' who constantly talks about love and believes in its power more than anyone else. When she was an angel trainee she was sent on a mission to Laharl's Netherworld and decided to stay there some time to get to know demons better. Due to various events she ends up being turned into a fallen angel, which is how she appears in most of the games.