Spiros Antoniou

Spiros Antoniou (Greek: Σπύρος Αντωνίου; born 24 October 1973 in Athens, Greece) is a Greek heavy metal singer, bassist, and visual artist best known for his work with Greek symphonic death metal band Septicflesh, in which he has been since 1990 foundation and of which he is a founding member. He has also contributed to bands such as TheDevilWorx, Chaostar, and Thou Art Lord.

Antoniou, under the pseudonym Seth Siro Anton, made several cover paintings for such bands as: Decapitated, Devian, Vader, Paradise Lost, Belphegor, Nile, Soilwork, Caliban, Heaven Shall Burn, Serenity, Kamelot, Flowing Tears, Moonspell, Methedras, Universum, and Old Man's Child.