Cole was introduced initially as an innocent and Assistant District Attorney from the charmed Ones' viewpoint, who has seemingly been targeted oleh The Guardian demons when the two sisters, Prue and Phoebe, inevitably get mixed up in police business when defending innocents from demons and humans in cahoots with the evil demonic underground. In backplot fact known to the viewing audience but unrevealed to the series characters, the half-human/half-demon Cole is working against the sisters interests and is deep undercover filling a human role while looking for a way to explore and identify the...