Help with name for Mara's sister!

[heimarmene]

In the novel I'm planning on writing for the August session of Camp NaNoWriMo this year, there's a pair of sisters, but only one has a name at the moment.

The older sister's name is Mara. She's around 27, very brash, almost crass in her mannerisms. She doesn't waste breath on pleasantries if she's not in the mood. She's a sort of a maneater-in-training, if you will. Doesn't like to listen to anybody but herself, and is extremely headstrong, but she has a good heart (a very hidden good heart, mind). She doesn't mind hurting people as long as she gets what she wanted.

The younger, nameless sister is around 24-25, and a lot gentler than her sister. She was a premature birth, so she's veerrryyy skinny, especially compared to Mara, who's a heartily curvy girl. She doesn't really approve of her job, but it pays well and the sisters desperately needed money, so she signed on. For the first part of the novel, she hangs back like a shadow.

The girls are half-Irish and half-Russian, and lived in Ireland til younger sister was 20-ish, so they have accents. They're essentially hired guns on a mission to Atlantis. I based them physically off of Kate & Rooney Mara, which is where Mara's name originally came from. Mara's hair is a long bob, and pretty much the same color as the Little Mermaid's :P Younger Sister's hair is longer, and a brown-auburn. They're both fairly tall.

Mara means bitter in Hebrew, which is fitting because Mara is very bitter inside. The younger sister tends to counteract this, so I was thinking maybe something that means bright/light/pure/etc? Other characters' names are Isla, Arthur, Edward, and Naida.

TIA

[amylin15]

I think maybe Fiona could work? Lots of names could fit, but for some reason I can't think of any others right now. Will probably get back to you later today

[east93]

I like the idea of Karina for the sister, her nn could be Kari.

Mara and Karina sound nice to me.

[michaela]

Caitlin
Julie
Maisie
Abigail
Lucy

[heimarmene]

Thank you all - I've picked Cordelia, since in Shakespeare, she was the sympathetic daughter. thanks for your help!