A cyborg, maybe. Cybernetic limbs is a possibility, but a full on robot I don't think so. Even the gene manipulation here is going to be primitive. This is the 1920's - twenty years from this point in World War II, tanks are going to just astound people on the battlefield due to their innovation. I don't want to construe that image, really. Even with a cyborg, there's not much to go on. Data disks essentially don't exist at this point, so most "tech" is actually just advanced engineering.

I see no reason to limit characters. >.>