Bishop of Arsinoe
Nikon held the episcopal see of Arsinoe, one of the ancient bishoprics of Cyprus. The sources that survive characterize him chiefly through a single episode: his recognition and ordination of Arkadios, a native of the village of Melandra in the Paphos region who had studied at Constantinople and, on returning to Cyprus, pursued an ascetic life in the island's mountains and caves.
The tradition relates that Arkadios's fame reached Nikon, who summoned him; after examining his thought and way of life, Nikon urged him to become a priest and ordained him. This ordination set Arkadios on the path he would later follow as Nikon's successor, when he was elected by the people to the throne of Arsinoe and went on to contend against Arianism and Gnosticism.