It's pretty easy to find in the Korrasami tag on tumblr if anyone cares to look it up, but... obviously don't spread it any further than it already has because YIKES
Also: What little writing we've seen really indicates that Mike did a lot of looking back on their friendship and the things that make them get along so well
Unless they're going retroactively introduce someone, she basically spent her early 20s running a massive company with no family and, given her conversation with Mako at the start of book 4, no contact with her friends