that.... isn't actually a Yukkuri, though.
That's the Normal Remilia practicing her cuteness in front of a mirror.

I adjusted the tags for character names and added the "deletion_request" tag since this doesn't involve yukkuri.

I think the last one is at least a yukkuri reference. So I vote for leaving it as it is.

The facial expression and the "U! U!" that was in the original script has to be remirya reference.

Sakuya's got a thing for Remiryas, so a good immitation would get her attention real good. Don't delete this.