Boudica was a Celtic warrior queen who became a Valkyrie upon death.
In life, Boudica was a warrior queen until her death in 61 C.E., where she died in battle and became an Einherjar. Sometime later she became a Valkyrie.
Just Another Decapitated Head
She is considered to replace Gunilla as captain of the Valkyries, however she cuts a lamp in two when she does not see snacks, which she was promised, and leaves. Odin passes on her for being too violent.