Date Mizuki

A character from AI: THE SOMNIUM FILES - nirvanA Initiative, also known as Okiura Mizuki in AI: THE SOMNIUM FILES.

Girl of Steel Pipe
A girl with inexplicable superhuman strength. She's the daughter of Lemniscate's CEO, and a close friend of A-set. While her father concentrated on his company, she started living with Date Kaname.

Due to certain events, she became the CEO of Lemniscate and Date legally adopted her. Sometime later, she would end up joining A.B.I.S., the special police branch Date works for, as a brand new special agent, employing Aiba while Date is on special missions alone or Aiba just wanted to take a break.

The Extinct Light
Continues living with Date and deadlifting 200 kg before throwing the weights into his various porn collections.

Episode 3

Aiba's last memory is Date drinking in Survive Bar before it cuts off due to system shutdown, but somehow she managed to reach Mizuki. As she waits in a street bench and wonders why Kiryu Kazuma called her, she thinks about how much trouble Date always gets into. Kiryu finally arrives, greeting Mizuki quickly despite having been a while since seeing each other due to the importance of this call. While Mizuki is ready to punch shit, Kiryu exclaims it's not like anything they've ever seen before, a creature completely devoid of light, he has seen evil itself before but nothing like this; this is darkness itself, a monster for sure, and it took Date away. And that's why he must stop Mizuki from going after it, because Date wouldn't forgive Kiryu or himself if anything happened to her; even Aiba agrees, and for once Mizuki manages to calm her girlboss impulses down... Kiryu figured it was his duty to let her know and gather any useful info from her, and while she hasn't really got anything, Kiryu has a plan to find out where they took Date, as there's no other choice...