It was pretty obvious that they were going to be learning some sort of appearance changing charm. But Indigo wasn't sure exactly what that would be yet. There were a number of possibilities, some mentioned by his classmates in response to the next question. Color changing charms, hair growth... Indigo tried to come up with other options before remembering that Dopple had asked for answers that were either magical or mundane, so his answer didn't necessarily have to be a spell.

"As for something mundane, there's makeup, professor. That's a pretty broad category, but lots of people use it to try to enhance their beauty." Indigo was specifically thinking of the eyeliner that he had worn a few times before. It always made him feel attractive.