Is character an adjective

Yes, the Word 'characters' is a noun, the pluralform of the noun character, a Word for a person in a story, novel, or play; a Word for an odd or peculiar person; a Word for a letter, number, or symbol that represents information; a Word for a person or a thing.

Note: The noun 'character' is a singular, uncountable noun as a Word for group of qualities that make a person, group, or thing different from others; a Word for a person's reputation of honesty and reliability; a Word for a concept.