Diamond Tiara is a rich little filly. She is generally very spoiled and loves to remind everyone about how great she is. One of her most distinctive traits is antagonizing the CMC for their lack of cutie marks. Her best friend is Silver Spoon and out of the two of them, Tiara is definitely the more antagonistic of the two. However, after the CMC received their cutie marks, her demeanor has changed quite a bit and she is now a more polite filly, even if she still does act spoiled.