Many beautiful words, but it would be more honest to return at least 5 merits.
Wouldn't that be like a merit exchange?
BRINIRHA received 11 merit for a post that doesn't deserve to receive merit. This was the first mistake. If BRINIRHA sends 5 merit to Gallar just because he/she has received 11 merit mistakenly, it would be the second mistake.
This is just my opinion and I think the best thing is to forget about what happened.