[A small nod as he feels the warmth of her charm against his chest where it rests beneath his shirt.]

Nightmare energy is just another form of dream energy, and can be viewed as a "negative" alignment. So long as it's countered with "positive" aligned emotions, then it appears to negate and balance, becoming nothing more than the kinds of things we see normally.

So I think the charms could have a positive effect, too...especially when their meaning along will help remind me of what we have.