She couldn't say unisex XD
She has a surprisingly cute side to her.
And all the demons managed to get out of trouble by troubling her instead! Nice chapter (no slaughter for a change)
I think I get why she was embarrassed. She has a small tongue (which she has a complex about) and couldn't properly say the word "uni-sex" because of it. She was embarrassed to try and say the word in front of others.