https://www.fanfiction.net/s/12372074/1/This-Is-the-Run This Is the Run
By: Joak Drysso
Ruby Rose discovered the boundaries of her new world early on. Then, she learned how to break them. Imagine how this looked to everyone else. [Set mid-season 1, twist on Gamer-style nonsense. Updated Saturdays.]
Rated: Fiction T - English - Humor - Ruby R., Weiss S., Blake B., Yang X.L. - Chapters: 6 - Words: 10,557 - Reviews: 43 - Favs: 255 - Follows: 239 - Updated: Mar 25, 2017 - Published: Feb 18, 2017 - Status: Complete - id: 12372074
tl;dr: Ruby's semblance is speedrunning. Complete with wrong warping, integer overflows, and bottle duplication!
I suppose it depends on what you mean by 'brave' and 'coward.' Remus had no problem with physical danger, it seems (tthough I suspect that has more to do with not valuing his own life that much), but does not seem to have had much courage for social and emotional situations (which may also have been a product of his lack of self-esteem).
Well, he did name one of his kids after his father and another after his mother... and I'm not going to try to justify naming one of them after Snape, beyond saying that the wizarding world has no thereapists, and Harry is likely nuts from PTSD.