Sa Roca Thejer
Logen is the adoptive son of Ragnarr "Hairy Legs"
Logen is rather non-descript.
When he turns into a werewolf he has red hair.
Logen had been held captive by W.T.T. for over a month. Due to his pendant he was unable to control his animal instincts very well and wound up attacking the party. This led to Aela and Henry being afflicted with Lycanthropy. He seems to be remorseful of this fact and has led his siblings to the party in order to help them.