Once upon a time, Mikkos met Barnabas. Some times after, Mikkos was appointed the caretaker of Barnabas' athlete nephew, Neleus.
During the Peloponnesian War, Neleus fell ill, and no matter what Mikkos did, nothing seemed to help. Soon after, Barnabas visited them, and Mikkos made the acquaintance of Barnabas' shipmate, the SpartanmisthiosKassandra. As Kassandra wanted to help Barnabas and Neleus, Mikkos guided her to Thasos while flirting with her.