extraordinary person; wonder; marvel
Refers to a person of remarkable talent or ability, often with a heroic or larger-than-life connotation. Can be used in fictional contexts for a mysterious or superhuman figure.
He is truly a person worthy of being called a wonder.
The protagonist of that novel is portrayed as an extraordinary chivalrous thief.
Compound of 怪 (kai, 'mysterious, strange') and 傑 (ketsu, 'excellence, greatness'). The combination suggests a person of outstanding ability with an air of mystery or eccentricity.