Protagonists adjectives are listed in this post. Each word below can often be found in front of the noun protagonists in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing PROTAGONISTS.
central, chief, female
great, human, key
main, major, male
other, principal, various
young
Hope this word list had the adjective used with protagonists you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.
flawed
Heroic