I have no description or personalities. You can do whatever you want. Tho, their cutie marks should be depicted as the item they are named after. i.e. Oolong's is shrivelled oolong leaves.

The Tea Clan are a bunch of ponies who come from Neighpon(Japony) and are very cultural. They are the perfect background pony/family or side character to help the main character.

Green Tea
Black Tea
These two I usually depict as elders, because their namesakes are really old.

Herbal Tea
If you need a healer in your story, this pony's got you covered.

Fruit Tea
Because fruit tea is not really considered a tea, this pony is usually the outcast or an adopted member of the Clan.

White Tea
Oolong Tea
Purple Tea
Matcha Tea
Pu'er Tea
Some more ponies if you need them.

7741467
I don’t know why but if I were to use these OC’s, I see them as a family of rich and powerful assassins.

7741690
Aye, could work, like an assassin's creed group.

7741698
It might also be because I’m thinking of Hunter X Hunter Zoldyck Family.

7741700
I like it!