I just thought of a small improvement that you might want to take into consideration. It's really not a necessity, just a small QoL improvement.
I noticed on a profile page that it selects a random icon for each placeholder. This means it will use different variants of Kibby for each comment, even when multiple of those comments are from the same user. I thought it would be less confusing if it assigns a random Kibby variant to a user upon loading the page, so it is consistent when reading a thread. It doesn't matter if it changes the assigned variant to a different variant when you go to a different page, but having the consistency in a longer comment thread could be helpful.