She has been dating online (as said on the date) and found Doofenshmirtz's profile and went on a date with him. It was a success, and they sang a song together. But after Doofenshmirtz's Delove-inator beam went out of orbit, it crashed onto Earth and zapped her, erasing her love for Doofenshmirtz, she turned Doofenshmirtz down ("Chez Platypus").
Her relations with Doofenshmirtz are obvious - the only time she is seen is with Doofensmhirtz ("Chez Platypus") but the relation does not last for long, as seen at the end of her appearance, she is zapped by the machine he made. She was shown dancing with Doofenshmirtz during "Carpe Diem," but Carpe Diem was a flashback of summer events.
In the "Happy Evil Love Song", it is shown Doofenshmirtz's unnamed ex-girlfriend and Doofenshmirtz torturing Agent P, they are holding him above a crocodile pit. It was possible that was a dream, but unconfirmed, otherwise meaning that she has no interference with Perry.
Likes tall men and labcoats and men with blond hair. Her previous date was 6'9".
In "That's the Spirit", a zombie that rises from the water, has the same hairstyle as her.