On the other hand, LW!Hermione failed to reproduce this experiment
I’m not sure how wide of an audience this post is targeting, but the !-notation feels gratuitous here. How about:
On the other hand, Hermione (LW user) failed to reproduce this experiment
While you’re at it, you might as well practice getting up, getting dressed, making the bed, starting the kettle (or whatever you would do for breakfast), etc.
(Disclaimer: I haven’t done this; I’ve only read about doing it.)