- Midnight is 175cm tall, her blood type is A and she was born in the Saitama Prefecture. Midnight likes ‘vibrant youth’ and thrills.
- Her name contains the kanji for ‘fragrance’ (香 ka), ‘mountain’ (山 yama), and ‘sleep’ (睡 nemuri).
- Midnight was originally supposed to be Class 1-A’s homeroom teacher but was later replaced with Shota Aizawa. Hirokoshi said this was because he wanted Class 1-A’s teacher to be someone willing to get ‘sharp-tongues’ with the students.
- Midnight has stated that her first hero costume was the reason why regulations were made to limit the amount of skin that can be exposed for hero costumes.
- Midnight’s stats according to the Ultra Archive Book are:
Power 2/5 (D)
Speed 3/5 (C)
Technique 5/5 (A)
Intelligence 3/5 (C)
Cooperativeness 3/5 (C)
Her stats according to the Ultra Analysis Book are:
Power 2/6 (D)
Speed 3/6 (C)
Technique 5/6 (A)
Intelligence (3/6) (C)
Sexiness 6/6 (S)