Mikoto Yoroi is a classmate of Takeru Shirogane in class 3-B and one of the heroines of the Muv-Luv series, appearing in Muv-Luv Alternative as a supporting character. In the main timeline of Alternative, she is female, whereas in the Extra timeline she is presented as male, though the two versions are physically nearly identical. Her father, Sakon Yoroi, has an obsession with survival sports and frequently takes her on trips to remote wilderness areas around the world, leading to her frequent absences from school. As a result of these experiences, Mikoto possesses exceptional survival skills that are unrivaled among her peers. She is also a dedicated player of the arcade game Valgern-On, often playing alongside Takeru. Her personality is marked by constant optimism and cheerfulness, even in dire circumstances. In the story of Muv-Luv Alternative, Mikoto enlists as a cadet in unit 207 and later becomes a pilot serving in Squad A-01, the elite Valkyries unit under the direct command of Michiru Isumi. She is assigned to the second suppression support position within the platoon. Throughout the narrative, she develops from a carefree student into a capable tactical surface fighter pilot, though she retains her upbeat demeanor. Her role in the story highlights her resilience and adaptability, as well as her deep loyalty to her comrades. She is the daughter of Sakon Yoroi, and her close friendship with Takeru is a defining relationship, rooted in their shared gaming hobby and her steadfast support for him. Notable abilities include her extraordinary survival instincts and resourcefulness, honed from years of being taken on extreme trips by her father, as well as her piloting skills in a tactical surface fighter. No reliable information exists to cover any further specific development or motivations beyond what is described here.