One of our chapter's founding sisters (we're only about... er.. 9 years old now or so) died after a heart transplant didn't take. Every year our chapter walks and volunteers for the walk that her parents have set up in her name. It's now a whole foundation in her memory.
The KDs on campus volunteered at the walk for us several years in a row so we could all walk together. This was particularly special since for my first two years there were actives who knew Casey very well. That is Panhellenic sisterhood