Yuuhi Koubuin

Yuuhi Koubuin Meiya's twin sister and Shogun of Japan. Yuuhi effectively oversees the entire Japanese military along with its political affairs, depending on which universe she is featured in) is a character that appears in various Muv-Luv media.

Unlimited
In Unlimited, Yuuhi is indirectly referred to when speaking of the origin of the Type-00R gifted to then-Cadet Mitsurugi Meiya.

Alternative
In Muv-Luv Alternative, Koubuin Yuuhi is the Shogun of the Empire of Japan. Always seen in a calm and graceful manner, Yuuhi seldom panics, and is respected by all who have spoken with her, and later, as the Shogun of the Empire. The twin sister of Mitsurugi Meiya, the two were separated from birth due to the superstition of twins being bad luck; Yuuhi remained as a member of the Regent House of Koubuin, while Meiya was sent to the Mitsurugi household. Despite that, Yuuhi cares deeply for Meiya, and was the one who ordered Tsukuyomi Mana to guard Meiya as her long-term assignment. Like in Unlimited, it was Yuuhi who gave Meiya her personal purple Type-00R as a gift.

During the 12/5 Incident, she secretly escaped the capital, together with Yoroi Sakon and her personal assistance. Sometime later, she was found by Cadet Shirogane Takeru of the 207th Tactical Armored Platoon. Taking her onboard his TSF to carry her to safety, her past was revealed to the group, and she managed to meet Meiya for the first time in years, her words to Meiya proof that her concern for her twin sister has not diminished throughout the years.

With the help of Meiya as a double, Yuuhi is escorted to safety, and as the Shogun regained many of the posting's previously lost political powers. Afterwards, she returns to Kyoto, and continues to supports Takeru, Meiya, and the rest of the group from the capital.

In Final Extra, she appears as Mitsurugi Yuuhi, transferring to Hakuryou along with Meiya.

Altered Fable
Similar to Final Extra, Yuuhi competes with Meiya and the other girls for Takeru's affection.

Total Eclipse
Yuuhi appears in the prequel arc of the anime, prior to becoming Shogun, holding an audience with Iwaya Eiji about the development of the new weapons (EML-99X Electromagnetic Induction Launcher).