Concerning Saint Helladius, little is known except that he was a bishop who refused to sacrifice to idols, and that during his martyrdom our Lord Jesus Christ appeared to him and healed him of his wounds, after which he was thrown into fire because of his faith in Christ, but he remained unharmed. He died as a martyr from the terrible beating inflicted upon him.

In the Service to Saint Helladius it is said that the Lord Jesus Christ visited him in prison and healed him of his wounds. According to certain sources, Saint Helladius suffered under the Persians during their invasion into the Eastern part of the Roman Empire in the fourth century.

Apolytikion
As a sharer of the ways and a successor to the throne of the Apostles, O inspired of God, thou foundest discipline to be a means of ascent to divine vision. Wherefore, having rightly divided the word of truth, thou didst also contest for the Faith even unto blood, O Hieromartyr Helladius. Intercede with Christ our God that our souls be saved.

Kontakion
Since thou didst flourish like a fair and fruitful olive tree, thou as an athlete that contended well and won the crown showest kindness unto all that seek grace and mercy. Do thou guide us unto knowledge of the Most High God as a Martyr and bright luminary of the Faith; for we cry to thee: Rejoice, O Father Helladius.