I used the character names on wikipedia... didn't know that Alias conflicted with another picture... maybe somebody can clear up what we do with her name?

Assuming neither character has a last name, you could just change one to alias_(series).

..Given how unlikely it is we'll get much more art for Zwei Worter outside of game cgs, I think that's the obvious choice.

Some new images on the blog have a different romanization of the valkyria girl's name, "Aliasse."

http://stat001.ameba.jp/user_images/20091225/22/val-log/6f/aa/j/o0400057110353269147.jpg