This sounds like an aspect. If she doesn't want to actively control it.
It will come into play when you compel it and it will benefit her when she invokes it.
If you want karma, let her invoke the aspect for free which gives you a free compel at a later date.
No need for a power or a track.
This is a reserve idea I'm keeping on hand in case the player's preferred method of the Karma track and such doesn't pan out. She's got some RP experience but DF is totally new/different and she's already having a little difficulty wrapping her head around aspects and their function. The karma track is a little closer to her stat-based game experience and will hopefully provide a crutch until she's ready to dive it deeper. When and/if we can go with the aspect approach (my preferred choice) I'm sure things will get even better (less bookkeeping at minimum).
The holidays keep us from playing (too many family and other social obligations getting in the way) until after New Year. We'll get cracking before Valentines. Until then I've nothing to relate, but will make sure I give some feedback once I have it.
Thanks again, y'all... very helpful.