The term 'Curious One' can be represented by three crossword solutions: STARER (6 letters), PANDORA (7 letters), and ODD (3 letters). STARER is a person who stares intently at something, often out of curiosity. PANDORA is a figure from Greek mythology who opened a box containing all the evils of the world, despite being warned not to do so out of curiosity. ODD is an adjective meaning strange or unusual, which could be used to describe someone who is curious.