May Edward pheromone your character? Yeah, sure. Just realise he's pretty darn desperate, so attraction ones may not be the best idea. Or repulsion ones, since trolls do kind of have an entire sector of romance just for that special someone they hate above all others...
What does your character's soul smell like? A shockingly organised mish-mash of wrath and desperation, with overtones of overly sweet plum wine, undertones of angelic light, all wrapped around a tiny flicker of hope. (Although it's worth noting that in Alternian society angels are closer in nature to the human idea of demons, being terrible beings...)