Certain characters

characters - qualities, tone, feeling, disposition, complexion, temperament, makeup, ethos, mentality, properties, features, essence, spirit, feel, nature, identity, personality, temper, traits, resolve, backbone, uprightness, rectitude, strength, fortitude

certain - assured, satisfied, in no doubt, positive, convinced, confident, sure, persuaded, irrefutable, evident, confirmed, recognized, not in doubt, definite, beyond question, undoubted, undeniable, acknowledged, undisputed, indubitable, obvious, accepted, unquestioned, unquestionable, indisputable