I like
Micah for either sex. I prefer the look of the spelling
Mica, but many will probably think it's mee-ka. it's up to you.
I think
Mica Noelle /
Micah Noelle is really cute and has a great sound to it. but I do tend to like male names on girls (
Georgie is one of my favorites for a girl!). plus
Michael is a family name for me.
do what feels right to you.
Luxiana