Yeah, but she's refered to as "-kun" and even as "him" unless that was a translation error. I don't know how Japanese works exactly, but generally -kun applies to boys and I don't know if there's any gender neutrality when refering to other people.
Ya know, I was sure s/he wore a bikini/swimsuit in the swimming pool segment in episode 4, but I just went back and looked and s/he conveniently has jacket and shorts on.