I doubt she uses my full name. It confuses even the most clever.

[wow wait Beleth doesn't talk about him??? when he talks about her?? and she's an elf?? uncool. when she can think straight this will definitely be discussed.]

I am disallowed from disallowing, you do not care that I am allowed... When in fact, granted temporary power, I can of course disallow.

But your worry for your sister has fractured your logic. I can no more fault you than I can be angry. Go with a very general blessing, my friend. I hope its lack of specificity does not weaken its power.