The familiar magical girl whose motto is "Full Power, Full Open." A 13-year-old middle school student. An S-rank aerial combat mage commissioned by the Time-Space Administration Bureau Headquarters. Perhaps because she suffered life-threatening injuries in the battle against Maxwell, she no longer engages in the self-sacrificial behavior of her past and has come to value enjoying life. She still loves flying, and her recent hobbies include aircraft spotting and piloting. She is so invested in aircraft spotting that she even tries to turn down missions from Hayate by citing vacations and air shows as excuses. On the other hand, while she no longer pushes herself to the breaking point, her peerless combat prowess has been further refined. Instead of her original long-range bombardment style, she now annihilates swarms of berserk robots and Invasive Species in close-quarters combat using Raising Heart—which has been upgraded to deploy mana blades—or by beating them to death with staff techniques. Since arriving in Mizuho, she has been in charge of ecological surveys of Invasive Species and scouting local forces.

An S-rank aerial combat mage and Enforcer for the Time-Space Administration Bureau Headquarters. Currently on secondment from HQ. Since arriving in Mizuho, she has been in charge of investigations related to Mages and the legal aspects of organizational operations. Her device is Bardiche.

The Director-General of EXCEEDS and a close friend of Nanoha and Fate. Although she is the same age as Nanoha and the others, in this story, she uses transformation magic to appear as an adult in her 30s outside of her days off to deal smoothly with people from non-administered worlds. While she is soft on Nanoha's peerless antics due to their bond, she also has a side as a "black company" boss who assigns excessive work and rarely allows vacations due to labor shortages (a fact she is aware of).

The Chief Secretary to the Director-General of the UN investigation agency EXCEEDS. She assists her superior and Meister, Hayate. Matching her master Hayate, she has grown into a physique suitable for a secretary through hard work, and her facial features show almost no childishness, giving her an atmosphere close to the previous Reinforce, Eins. Unlike Hayate, who is soft on Nanoha, she has a strict personality regarding discipline. However, while she calls Hayate "Director-General Yagami" during work, she occasionally shows her true self by calling her "Hayate-chan" as she always has when they are alone.

A Special Force Tactical Instructor attached to the Director-General of the UN investigation agency EXCEEDS.

A high school girl. She uses a large revolver-type device called "Revolta."