George obvs knows Ginny. As Maxi said, he's been with Alicia for somewhere around ten years and they just recently got married via eloping - but let's face it, it's probably the best way they could've done it, though they are planning a huge party. He loves his little sister and says she will always be his baby sister no matter how old they get, but we've talked about them already ~
My other is Cho Chang, who got a degree in psychology from a Muggle university after the war and is currently in talks with St Mungos for a sort of psychiatric program where people can go for emotional counseling and just someone to talk to etc. Because that's not bringing in much money, she's currently modeling and things like that. She's very sweet and friendly though, kind of embarrassed about how she acted in school but she's grown into a fairly stable, optimistic young woman. She'd be nice to Ginny, though it's up to you how close they would be. Cho doesn't hold any grudges and is all about the whole clean slate thing. Yay!