Lucifer

She is a troublesome girl with the most magical power at her school. Her country of origin is unknown. In the past she was involved in a large incident and became known as the "Evil Rebellious Magical Girl", and became feared all throughout the country. Because of this incident, she became very rebellious and arrogant. She loves board games and is a member of the board game research club at school, but because no one else is in the club, she ends up playing with Angelica all the time.

She is a member of "Sadistic★Candy". She is still feared as the "Evil Rebellious Magical Girl" even in her special class...but she doesn't care too much about it and believes that it is "fairly normal". However, her classmates are slowly losing that image of her. She wants to make a character of herself as "the strongest magical girl being so normal".

(Source: Lapis Re:LiGHTs Wiki)