Colin. He runs through his memories of the younger mages before having to shake his head. Vague familiarity is all he has there, which likely means the man had been brought in sometime in the end of Anders' time there when things had gotten... difficult.

"Healing and being a Grey Warden, primarily. Setting up a school for mages and others when time permits, and trying to help build the future for mages in the rest of my spare time." If the man is this pleased by what Anders has done, then saying that much could only help. There's always the worry that someone being a fan might mean they're more radical than he is anymore and he needs to be careful and not inspire more destruction and death.