I also wondered about the werebear theory. That would explain why he can use multi attack and our druid can't. That would also explain why he seem to have trouble controlling himself in that scene.
There are also theses lines in the game :
<content contentuid="h02cf842dgc135g4047g90ffgd985ae2a0745" version="3">Should you change your mind, head west. Halsin is an elf with the presence of a bear.</content>
<content contentuid="h134f59d4g3945g410fg99bag22d0871dab3d" version="2">Kinda disappointin', for a bear-man.</content>
<content contentuid="h2cffaa54g4779g48a0ga24dgc459e8d54573" version="4">See that? Fella was some magicker bear-elf and he didn't stand a chance.</content>
<content contentuid="h32309ddbg269fg4d82g976bg93be7e35ea80" version="4">Having a shapeshifting bear-druid at my side might make things easier.</content>
<content contentuid="h44a4f576g8ce4g437fg9dffgc8795abfa751" version="1">Be warned - my presence could make things more difficult... I can only restrain my bear form so much. I won't be able to help but attack goblins.</content>
<content contentuid="h8fc9387bg5a7ag4958g9a15gddd24580de90" version="3">Halsin is an elf with the presence of a bear. He left west, with the adventurers.</content>

Mmh...