Mira is a humanoid Neighbor from the nation of Aftokrator. She is a member of the expedition force that carries out the large-scale invasion of Mikado City. She has a medium stature with short, curled burgundy hair that reaches her chin, styled in a bob cut with spiral bangs at the sides and straighter bangs on her forehead. Her eyes are purple. The author has stated that her design was inspired by a devil.

Mira is a quiet and reserved individual who speaks only when necessary. She is calm and composed, but also coldly ruthless. She is utterly obedient to orders, particularly those given by her commander Hyrein. This loyalty leads her to kill a fellow expedition member, Enedra, when Hyrein orders it due to Enedra repeated insubordination and poor conduct. Mira does not hesitate to eliminate anyone who obstructs the mission, even an ally.

Her primary motivation is to carry out her duties as a soldier of Aftokrator. She shows no personal ambition or rebellion against her role. She is also noted to enjoy certain things such as completing missions, supporting her allies, high places, and pancakes.

In the story, Mira serves as a support unit for the Aftokrator invasion force. She remains mostly in the background, handling logistics such as deploying trion soldiers, retrieving Black Triggers from defeated comrades, and providing warp transportation for her teammates. She occasionally joins the front lines but is primarily focused on assisting Hyrein. Her role is essential to the invasion because her Black Trigger allows her to quickly warp allies across the battlefield and retrieve valuable Black Triggers after a battle, which would otherwise be lost.

Mira key relationship is with Hyrein, her commander, whom she follows without question. She is also connected to her fellow soldiers Lambanein and Enedra, the latter of whom she kills on orders. There is mention of a planned political marriage between Mira and either Hyrein or Lambanein, though this has not yet occurred. Within Aftokrator, Mira is widely feared for her warp abilities; the threat of the warp woman is said to be used to scare children into behaving, a fact that she is somewhat embarrassed about.

Mira does not undergo significant personal development during the story. She remains a consistent and effective tool of her nation mission. She is regarded by the author as the most useful character in terms of advancing the plot, and her ability to warp allowed the author to write the large-scale invasion arc.

Mira notable ability is her Black Trigger, named Shadow of the Window. This trigger allows her to open warp gates that can transport herself or others across the visible area. The gates require increasing amounts of trion to open larger portals, and they take longer to open as size increases. She can also use the gates to redirect incoming attacks or project spike-like projectiles from the gates. While her direct combat capability is not exceptionally high, her warp power makes her an invaluable support and a dangerous opponent when paired with allies. Mira has low trion capacity relative to some other Black Trigger users, but her medium trion, high defense and support, and very high mobility make her a versatile asset.