Mephisto and Praxina

Mephisto and Praxina are Gramorr's henchmen and the twins in the television series LoliRock. They are sent in missions to fight the girls (Iris, Talia and Auriana) and to steal the Oracle Gems. They often get hit by the final attack named Crystal Luxtra in most of the episodes (except for Sirens, Shanila Surprise, Castle in the Sand, ect.). Mephisto is the male character who wears a green uniform and Praxina is the female character who wears a red uniform.

Mephisto
Mephisto is the oldest twin brother of Praxina and the sadistic out of all of them. He can sometimes be an idiot, explaining why he mostly argues with his sister. He has violet hair, green eyes, and pale skin. He also wears a black and white uniform with green lines around them. He also wears black gloves and shoes. He's voiced by Vincent Tong.

Praxina
Praxina is the youngest twin sister of Mephisto and the evil out of all of them. She is more smarter than her twin brother and always thinks of evil plans that always fail. She has violet hair, blue eyes, and pale skin. She also wears a black and white uniform with red lines around them. She also wears black skirt and shoes. She's voiced by Kelly Sheridan.

Powers and Abilities
Just like the protagonists of LoliRock, Mephisto and Praxina possesses evil magic and they have Crystal Spells similar to the girls but more evil.

Trivia

 * A running gag is where Mephisto and Praxina get blasted off to the sky and a star appears similar to Team Rocket from the Pokémon franchise.
 * They often create monsters to fight off the main characters.