The alleged victims of the star, aged between 11 or 12 and 16 at the time, include two sisters, one of whom says she was twice raped by Roache in 1967. However, Roache has denied these charges.
Prosecutor Anne Whyte described Roache's methods to Preston Crown Court as "designed to impress a young schoolgirl and to secure her unquestioning loyalty as a fan for a sexual purpose, a sort of grooming".
Whyte opened the case against him at Preston Crown Court in northwest England.
However, Roache has denied all the charges.