Based on how things are progressing, I would think Aguta accidentally stumbled into this mysterious dark mage's hideout, as that what it seems like to me anyway. I like the direction you took with this Icarus, what will he discover and how will he get out? Anyway, I'm gonna rule that since Nexus is no longer playing as we've all given him plenty of time to respond, both here and on the actual thread, as well as through PM's, that the beast should be NPC'd along with the dark evil mage that conjured the storm.
In light of the couple of posts that Nexus did post, I think we should go with what he wrote there in terms of the beast, that is a sickness which plagues his mind and that its a warrior arctic bear wearing diamond plated gauntlets. Where the beast is now, I believe it makes sense that the mage controls it and its actions. That this wizard guy is simply biding his time for whatever. Anyway, that's all I got for now. Hope that helps.