Cera with her temperament and character nature...
It's the reason why Cera is more far from me than other characters.
(I wonder did she ever apologize for her words about Littlefoot and her mother in original movie?..)
Ducky is epitome of good: smile, fun, joy and shiny day in our souls.

I like these qualities of her character.
Ruby, during her short appearance in LBT universe (only TV series), has left good impression.
I think we still don't know very much about Ali's nature. There still could be many situations where she acts bad (TV episode is clear example). I want to see her again (and after news about reappearance of "guest" character in next sequel, Bron, there's small chance to see her again in next sequels)