Valkyrie Core: Golf to tennis ball sized orb, size is indicative of nothing. Generally white, occasionally shaded, colour is indicative of nothing. Glows softly, emitting enough to be always just above background ambient light. (Attempts to create a self sustaining powerloop by putting two cores next to each other and having them shine brighter than each other have failed.)
Valkyrie Frame: The Valkyrie Core along with all the components* synchronised to it. That's it, nothing else to it.
*Component: Anything synchronised to the Valkyrie Core.