I think she doesn't quite understand that her summoners don't just want a girlfriend or even a sexbuddy, they want her.
Which, to be honest, is kind of an unhealthy way of living one's life. Sure, the notion of having *~One True Love~* Tee-Emâ„¢ is an attractive one, but just because someone is everything you want, you might not be everything they want, and coming to terms with that is just another part of becoming a functional human being.
Honestly, isn't this kinda ambitious though? They don't just want any demon GF, they want an extremely powerful demon GF of legendary status. I can respect that honestly.