MLP Naming and Cutie Mark Help Needed

Okay, so, I adopted these two lovely ladies, right?

:thumb444081097:

I've drawn them and given them personalities, but I can't think of names or cutie marks for either of them.


Here's what I have so far:


They're twins.

The one on the left is a little bit younger and smaller than her sister, and is the more quiet and shy of the two. She's the one who would rather sit and watch others do things, and help her sister when she needs it.

The one on the right is bigger and older. She's more social and active than her younger twin. She can be loud and unintentionally rude. Hates asking for help or admitting she was wrong.


I'd love it if they had similar names. X3

If possible, I'd like the names to include the words "Blue" or "Twist/Swirl".


As for cutie marks...

The younger one is good at music and singing, and her sister is good at sports (mostly racing).


Any ideas?