Vise was a member of the Crimson Order, originally named Hexxus (or whatever name Seelus said, ill update after i play it again). He fled when things started getting bad and changed his name when he found Emberlight/Haven.

Unless I'm missing a piece of info, this could really work as he seems to know quite a bit about Seelus and infact could have been the one to inform Feron of his location. (once again, call me on this if I'm wrong, I thought this up in a hurry after beating the Tier 1 mission)

All in all, fantastic work on Operation: Crimson Hammer, It's challenging, even the T1 version. My only gripe is the behavior of the gremlins with the Shoulder mounted launcher, their tendency to hop into a corner or against a wall is frustrating, as it totally blocks their weak point. But the fact that you can play keep away after knocking it off is a nice touch of comedy.

Shame it's only available with $$ though...