Halsin will be at your camp but only join you a bit later when certain quests involving him are finished.
I was surprised to see the beefiest bodybuilder guy in the game has 10 Strength. With all the attention to detail, it's odd such a simple thing like character stats are so far off from how the characters are presented. Not as bad as an "archdruid" mechanically being level 5-7 though. There's a dissonance and wish the game mechanics and storytelling would support each other rather than what seems like completely ignoring each other. Level 7 PC's acting like they are much more powerful isn't cool. That and the fact that they come into your party with level 1 starting equipment makes me not want to ever travel with them.