Isobel is interesting because she's as in-control as my previous heroes, whereas my heroines tend to be more vulnerable. And yet we know the price it's costing her. She's cool, unflappable, but sooner or later she's gonna flip out, and it's going to be extremely interesting.
She's already killed the hero once (or so she thought). I'm guessing she's going to try again.
Which will, of course, lead to delicious sex.
Hey, the price of true love is extremely steep.