I think I have an idea who this character is, but I can’t place a name to it.
Remember how the Chinese illustrated the Japanese as “devils” or “demons” because of their cruelty back in World War II? I seem to recall reading a recent Japanese retaliation by turning that character “moe”.
Then again, there are a lot of miko characters out there and she could be one of those too. Otherwise, her hair’s like Yuuko’s.
Any guesses? Thanks to Madelynne for sending this!
EDIT: Thank you to everyone who commented! I will add her as Hinomoto Oniko because more people seem to think she is that Japanese Devil, moe-fied! Thanks again, everyone!