lich-like-lichen said: I think because the title alone expresses some sort of tragedy. Extend Ash, the ash will extend indefinitely, meaning things will continue to burn around that person (Mokou) and she will never have anything forever. Hourai Victim. It spells it out that Mokou is a victim of the Hourai potion, not voluntary in a sense, she has learned to regret her decision and now knows that it is a poison, not a potion. The worst type of poison, one that kills everything around you, but not you.
I agree to a lot of that, yeah. I suppose it’s no coincidence that Mokou is one of my favorite Touhous, too. A victim of her own single-minded need for revenge. It’s almost ironic how in her attempt to get even with Kaguya she ended up damning herself for all eternity. The worst part of it all isn’t that she’ll never truly die, so much as knowing everyone close to her will die before her, and there’s nothing she can do. I suspect that’s chiefly why she lives alone in the forest. All the fire and burning everything I think is just a result of having learned new things over the millennia she’s been forced to live, not so much directly because of the elixir (though it certainly bears responsibility).