Joint accounts of Circle Twilight Dusk, consisting of Aikura siblings.
- Japanese name: 藍倉 真昼 (Aikura Mahiru)
- The older brother of the siblings, the circle leader and a writer
- Japanese name: 藍倉 秋夜 (the correct reading is unknown)
- NicoNico nickname: ぼんちり (Bonchiri)
- The little sister of the siblings and an artist
- Very old solo circle name: MtS
- Circle name: TWILIGHT DUSK
- Also known as: TD or 黄昏図書館
- Joint nicknames: 藍倉さん (Aikura-san) or 藍夜