He Needed To Focus

Keith had never once thought of Frostine as a woman. She was far too intimidating for that. Plus she often treated him like he was an idiot, which was a major turn off. Who would be interested in someone like that?

She was capable (almost overly so), clever, and could hold her own in a fight. There were definitely less female heroes than male ones in New York City though he couldn't speak for elsewhere. Of all of them, she was definitely the least feminine. 

It had nothing to do with her looks. He couldn't see much of her face so he had no idea if she was a beauty or not but she had hair that went halfway down her back that was always tied in some sort of braid and had some curves despite being lean and toned like most heroes. She was about average height for a woman too. Maybe 5'6". Going off that alone, she was plenty feminine.