''Wolf Freki'' was one of the ancient weapons excavated from the Underground Ruins of ARCHECORE. Its' current known forms include wolf and energy vehicle forms and it maintains its original black color from when it was excavated. Compared to "Wolf Geri", Wolf Freki's wild disposition makes it harder to control which is why the military lets Wolf Freki handle all frontal assaults and highly dangerous combat missions. Stulla upholds the Veck tribe's fierce battle spirit and is one of the few Arche-soldiers who can team up in battle with Wolf Freki; he's also a Veck warrior who once won the "Veck Iron Fist" twice. AC.391 Stulla was recruited by former Ursus Guard Commander Legion Haier Lodbrok to join the assault team - Starfall Squad and head into battle with Wolf Freki. On the other hand, after establishing a base in Niðavellir during the Operation E.p Recapture, no word has been received from Helfdan 3 days after he infiltrated Elmo Polis. Now, Stulla has abandoned all original plans and travels alone to save his brother Helfdan...