Sera

She is the daughter of the previous Demon King. Was locked in a Rank D dungeon, Cave of the Lurkers from where she was rescued by Kelvin. She is in love with Kelvin. She has long red hair with matching eyes of the same color. From an early age, she was educated by her father, Gustav. Therefore, she has various knowledge despite being quite naive. She's weak to alcohol and has a bad drinking habit. Her hobby is fishing.