Kind of bouncing back what you said to me, but when Barry returns he will definitely have to get to know his new roommate! Also, I'm not sure if he and Lydia have actually ever talked about Allison, but he will be glad that she has her best friend there.

I'm sure we can find some kind of trouble for them to get into. Also, Tony will totally make her a crossbow and start calling her Hawkeye. Or hawkgirl. Or something equally terrible.