I found a preview of another VC2 manga, this one focusing on Aliasse. This one seems a bit more... comical? I dunno what word would best describe it.
http://maoh.dengeki.com/try/valkyria/01.html
By the way, is there any more of the regular VC2 manga available?
EDIT: Here's another link which has more info on this particular manga.
http://maoh.dengeki.com/blog/varcyuria
From what I can gist from it, it looks like Magari has a leading role in this alongside our loli-Valkyria. Yay for moe Darcsens!