She has a very innocent personality. A yokai who manipulates the twilight. The darkness that surrounds her is humid and a terrible environment, but she doesn't mind it much. She has yandere tendencies, wanting to trap the person she falls for inside her twilight forever. Since she only bathes once a week, she smells quite a bit like sweat. At heart, she has a cute personality and just wants to play with humans. You will be taking care of Rumia. Try to help solve little Rumia's problems.