In our flock of five chickens we have this Brown Sex-link hen who's about 3 years old now. She has always been the friendliest (to me, definitely NOT Emilie) but yet the most aggressive of the bunch. She also behaves and acts much like a rooster.
When food is made available to the group, she'll always cluck-cluck like a rooster does essentially calling over the other hens and even goes so far as to offer up whatever it is she's fawning over at the time. Something you typically see a rooster doing. She's also on the ready to come to the aide of the other hens when\if they're threatened. Just ask Emilie
She doesn't crow like a rooster and I've never seen her even try.
However, she posses a single spur on her right leg. Spurs are a rooster trait, not a hen. Yet, as you can see below she has one and it's BIG! Perhaps, you can understand Emile's apprehension when needing to go in the coop to collect eggs.
She still lays eggs.
So, I'll name her Caitlyn!