"I'm Ruby!" The red haired one with black lipstick happily said "And I'm Onyx!" The black haired one with red lipstick followed, a bit less enthusiastic "You look great, honey!" Ruby said, with a smile "You look stupid and ugly." Onyx said with a frown

The twins were already disagreeing and ready to fight each other if you didn't do anything. It seems the twins can't stop competing and trying to ony up each other... You could present with anything as long as it's a competition and they would probably do it...