Gordon Freeman

-Gordon Freeman (main character)
-Miho nishizumi (commander of oarai academy)
-Maho Nishizumi (commander of the German Kuromorimine Academy and Miho's older sister)
-Erika Itsumi (Vice Commander of the German Kuromorimine Academy)
-Nishi (commander of the Japanese Chi-Ha-Tan Academy)
-Kay (commander of the Saunders US military academy)
-Katyusha and Nonna (Commander and Vice Commander of the Russian Pravda Academy)
-Anchovy (commander of the Italian academy Anzio)
-Darjeeling (Commander of the British Academy ST. Gloriana)
-mika (commander of the jatskosota finnish academy)

(Extra fact: all the girls here know about Half-Life and Gordon Freeman, but they've never seen him in person, since Freeman is a video game character, until he appeared in their universe)

Gordon Freeman (a quiet scientist, not mute but not very talkative) after destroying the Citadel's reactor, G-Man stops time before the explosion reaches him and takes him to the Girls und Panzer dimension to calm down. Gordon wakes up and sees in the distance the commanders of almost all the Shensha-Do academies, planning their tactics to defeat the All-Stars University Academy. Then one of them, Miho, manages to spot Gordon.