I was wondering if you guys can help my critique my twin OCs...

I rarely make twin OCs, so that is why I wanted to be more careful than sorry. These two run a coffee shop in Ponyville, and I haven't came up with the name for it.

So here is my first twin, Koko.

Personality: Her personality is that of a "hard to get" pony. It's agressive towards competition with other shops, and to be being friendly and hyper the next. She is the eldest sister. She loves her sister to death, despite the two getting into constant bickering like sisters would.

Background: She is the manager of their coffee shop. She and her sister come from a family that happens to run a coffee farm that grows coffee beans to ship, sell, and brew. The two siblings became involved in the work their family did, they decided to move out of the farm and into the town of Ponyville where many ponies inhabit. After working seperate jobs, the two gained enough bits to finally buy their own shop to continue the family legacy of coffee makers. But they don't always sell coffee. They can sell candy to hot chocolate. The two take a liking to their job, but face many competitions with neighboring shops.

So here is out next sister...I really haven't came up with her name yet. So if you got any suggestions on what here name should be, it will really help!

Personality: She is more a pacifist than her sister will ever be. She doesn't like to get involved with competitions, though she can rarely be seen to share her sister hard flank behavior towards them.

Background: She is the co-manager, and takes Koko's place while she is away. (read Koko's backstory)

I would love to apologize for the poor drawings...this is a ROUGH DRAFT.