Do you like black ones?

"Hmm, if I'm all black, I look like a witch." A black-haired girl groans in front of the mirror. Her hair is black, her clothes are black, and her hat is black—she's certainly all black. "I think I'll go with this." As Katarina casts a spell, her lustrous black hair instantly transforms into a vibrant gradient color, predominantly blue, changing to red. "Lina, you're still so skilled at using magic." "You won't get anything by praising me." (If she can use magic that well, she should try harder at school.) Katarina didn't hear her roommate's murmur.