I’m a cupcake, hmm? Delish! Your idea reminds me a little of Pushing Daisies, which has a pie-maker with the ability to bring dead things back to life with his touch, an ability that comes with stipulations.

I don’t know enough about your character’s healing abilities to really have an opinion 😛
How would you like the canon characters to react to such an ability? That’s part of the fun of writing a fanfic! Go for it!
Anyone is welcome to reblog/comment in response to Anon w/ their own ideas.