Vilkas

Vilkas is a Werewolf who resides in Whiterun, Skyrim. He can be found within the building Jorrvaskr. He is also a member of the Companions along with being a member of the secret order known as "The Circle" and is the players shield-brother for several of the Companions quests. He is an NPC you can marry after completing The Companions Questline.

While his brother is known for being a stronger fighter, Vilkas is known for being more level headed, and the more intelligent of the twins.

After the Companions Quest line is completed, the player can go to Vilkas to ask for more work, He will eventually give the quest Purity.

Trivia

 * The word 'Vilkas' is a Lithuanian word meaning 'wolf'.

Bugs

 * As with Farkas there is a bug/glitch where he will draw his weapon, and talk to you constanty, as if he was a guard attempting to arrest you. If you try to wait while in the same building, it will say " You cannot wait while guards are coming ", same with Fast Travelling. It could be possible that he is considered a Guard in-Game, and will pursue you untill all your crimes are paid for in gold, or prison sentence.
 * If a follower is with you during the initiation battle into the Companions and the follower attacks Vilkas, Vilkas will constantly attack you from that point on.