Which name do you like better?

I am writing a story and the leading ladies name, as of now, is Kirbi. I like the name because she is tough and also playful but I came across another name.

The name I came across is Cossette and I adore it.

But I love both of them, I would appreciate some input on this delemia.

And if you have a better name please, I applaud you to tell me.

Thanks for you help! :{D