Michael MichaelSon

"You didn't recognize my voice, I'm surprised after all we've been through a lot together." Michael to John and mat after his return

Emily Kulk
Emily and Michael's relationship appears to be fully professional as Michael never calls her Emily, something he does for all of his friends regardless of rank, and she refers to him as his proper title Augustus. after Michael ordered her to be killed Emily harbored great hatred for Michael until she saw Chaos-Agent-03's mission logs and saw why Michael lost his sanity.

Erwin-7532
Erwin-7532 is Michael's best friend and as he describes it "the only Erwin I couldn't bring myself to ever harm."