Answer: Narcissus could be described as "vain".
Step-by-step explanation: The word "vain" is an adjective used to refer to someone that is too proud of the way in which he/she looks or too proud of what he/she has achieved in life. In that way, "vain" makes reference to someone that has a selfish attitude. In Greek mythology, Narcissus is a character that only cares about himself and his physical appearance; therefore, he can be described as a "vain" character.