It looks like a pullet to me. Girls can be a bit feisty too depending on their personality. I once had a pullet named "cocky pants" and appropriately so. It was the only thing we ever called her as that is how she acted whenever we interacted with her. She ended up being a sweet girl, but she was one of the bossier hens. Girls can also take on the rooster role if there is no rooster around. I've even heard them crow in the absence of a rooster.
yep...that is a red sex-link also known as golden comet....sex-links are color sexable....if this were a roo it would be mostly white with red on its wings.