Jon has known Kris for, well, forever. They were well known for making massive train and Lego cities and only getting into a very, very small amount of trouble.
Jess has been one of Heather's best friends since they met freshmen year of college at CSU. Whether it's a hug or a kick in the butt, Jess always knows exactly what Heather needs.
Jon and Thomas have been friends since college when Thomas hired Jon to work at the college radio station (which is the best job ever). Regardless of geographical location, Thomas and Jon have always kept in touch sharing the latest in the indie music scene, movies and games. Thomas is great to go with to a Giants game, for a beer, to a movie... You get the idea. Thomas is great. (and sports the SF Giants Rally hat with pride)
Annie has been one of Heather's best friends since high school. They met before school had even started their freshmen year during volleyball practice. They've been nearly inseperable ever since (apparently Annie went to CSU because Heather went to CSU!)