The woman codenamed 'Sigrdrífa' is a Valkyrie, a physically altered supersoldier treated with the Drachenblut Serum. Female subjects have proved much more stable under treatment and give a higher rate of correct implantation. Thus, this elite cadre of superpowered assassins is an all-female group.
The oh-so-original and unnecessarily-tight-clothed aryan uberwoman. The walkyries fill the role of both trustful bodyguard and mercyless assassin and saboteur. This particular lady earned the swords for her Knights Cross when she alone infiltrated and sank battleship HMS 'Black Prince' off the coast of Gibraltar.