A Major of the US Army, and as the CO of the 66th Tactical Armor Battalion Hunter. 

In Muv-Luv Alternative, Takeru wakes up three years after the end of Muv-Luv Unlimited to find himself back in his room. Although he first thinks that everything that had happened to him was a dream, he soon feels that something is wrong, and leaves the house to find that he has been sent back in time to the beginning of the events in Unlimited. Unwilling to accept something like Alternative V, he decides to help professor Kouzuki to complete Alternative IV and save mankind. 
(Source: Wikipedia)

A story of the bonds between those who fight, in a world pushed to its limits. On one of the countless parallel worlds that exist throughout spacetime, humanity has fought a decades long war against the BETA, hostile extraterrestrial invaders, using humanoid fighting machines called Tactical Surface Fighters. This is a story of how humanity lives and dies while on the brink of extinction… 
 
(Source: Crunchyroll)

Light novel adaptation of the visual novel trilogy, covering Muv-Luv Extra, Unlimited and Alternative.
 
Shirogane Takeru is a typical high school student with a lazy attitude and a love for the virtual reality mecha battle game Valgern-on. Even though he didn't really want it, he's popular in school mainly due to his daily fights with his childhood friend (Sumika) attracting too much attention. His life takes an unexpected turn when he finds a girl named Meiya he doesn't remember ever meeting in his bed one morning. She's later revealed to be the heiress of one of the biggest corporations in Japan. She immediately moves to his house and starts changing his life for the good with her one-track-mind and unlimited resources... 
 
(Source: VNDB)

Focuses mostly on the past and upbringing of Tsukuyomi Mana, and to a lesser extent, Maya. Showcases their meetings and relationship with Meiya and Yuuhi, and shows their perspective throughout some of the events from Alternative as well. 

Non-canon 4-koma based on the spinoff web game Muv-Luv Strike Frontier. Features characters from Muv-Luv Total Eclipse, Muv-Luv Alternative, Schwarzesmarken, and Strike Frontier. 

The second season of Muv-Luv Alternative.

Alfred Walken