Back to Dragon Age for a hot second
Connor joined the Seekers of Truth. But why? What exactly do the Seekers want with someone with his... proclivities? He spent time as an Abomination of Desire, he willingly converses with demons and spirits in the Fade, wouldn't that make him dangerous?
Well yes.
But that's less important than the other half of this:
The Seekers have a plan and need someone like him to carry it out. They need someone unafraid to talk to spirits, someone willing to walk in a demon's footsteps.