I guess Dai-sensei wasn't joking when she said she had hundreds of thousands of Magiclad Girls as her students. Heck, I'd say that Haruna is the only one who isn't anything else apart from that.
And that raises an interesting question: are Magiclad Girls immortal, like the other girls she's sharing room with? Assuming Eu, Sera and Yuki/Tomonori are, that would pose a bit of a problem there if she truly loves Ayumu and she's not immortal.