Karrin's middle name is Rose.
Karrin made a deal with Odin "for the chance to stay in the fight" during the time Harry was gone.
Karrin never tried to have a relationship with Maggie while Harry was gone because she was afraid to draw attention to the kid.
Kincaid actually did have romantic feelings for Karrin.
Plausible. Of course, romantic feelings can cover a lot of territory. But I could imagine Karrin impressing Jared. My hunch is that Jared isn't as much into 'soft' girls, so to speak.
Collin Murphy crossed paths with Margaret LeFay at some point.
Plausible. Colin was a Black Cat, after all. The trouble is that his being a Black Cat means that the most probable conditions for such a meeting would be hostile, and I'm not sure Colin would survive a confrontation with a Council-level Witch.
Head canon of my own: Colin Murphy did not commit suicide, or if he did, it was not voluntary. Either he was murdered and it was made to look like suicide, or he was more-or-less forced to do it, either by mind magic or blackmail or something.
A really sick combination of your head canon and mine would be that Margaret was responsible, on some level or other, for Colin's death. I don't think it's the case. If Karrin were still alive, I
could see JB torturing Harry with the knowledge that his mom killed Karrin's dad...but otherwise I don't think so.
