Diamond Mint is MInty Fresh's older half-sister (older by 10 months.) Despite being sisters, they are complete opposites. But despite that, they are extremely close. She is a member of the MAne 6 of the Bellatrix Kingdom.
Diamond is a fan of fashion and is a fashionista and a model of magazines. She also has some similarities with Rarity:
- Both have younger sisters
- Both speak with a different and high-class vocabuary and have a unique accent. (Diamond has a thick english accent while Rarity's accent is similar to that of the actress, Catherine Hepburn)
- Both have the tendency to call others terms of endearment. Rarity's is "Darling" or "Dear" while Diamond's is "Sweetheart" or "Sweetie".