Hey, welcome! :) I'm Kat and I play Emmeline Vance (from '78) and Astoria Greengrass (from 2000). Emmeline would know James (she's a prefect and knows of everyone, haha). Astoria, coming from the future, would know of him from history, but seeing as he's a Gryffindor, she probably won't care much for him.
You can reach me on aim at kattattackrawr if you ever want to plot/chat or anything :D Look forward to playing with you!