Deuteragonist
Origin
Ancient Greek δευτεÏαγωνιστής, originally in Greek drama, from ἀγωνιστής (agÅnistÄ“s, "a combatant, pleader, actor").
Full definition of deuteragonist
Noun
deuteragonist
(plural deuteragonists)- A person in a secondary role, specifically the second most important character (after the protagonist).
Usage notes
Much less commonly used in everyday speech than protagonist – while protagonist is a common term, deuteragonist is technical.