i'm completely flexible and a sucker for cliches. ginny is a ball of chaotic energy so i'd love to get a best friend to either balance her out or encourage her (depending on the character you wanna write). she's one of those people who's very often silly and unpredictable; it can be really difficult to get her figured out and to pin her down.
so i was thinking maybe that or an ex/current flirtation? i always hate planning out romantic lines, but i don't see anything wrong with a jumping off point!