The term 'Charmed One' refers to a person who is believed to be blessed with luck and power. The crossword solutions for this term are 'LUCKY' (5 letters), 'QUARK' (5 letters), and 'Leda' (4 letters). 'LUCKY' is an adjective used to describe someone who has good fortune, while 'QUARK' is a subatomic particle that is believed to be the building block of all matter. Lastly, 'Leda' is a figure in Greek mythology who was seduced by Zeus and bore him two children. All three of these words can be used to describe someone who is considered to be a Charmed One.