In which TV series is Angel a main character?

In which TV series is Buffy Summers a main character? Who played Willow Rosenberg in 'Buffy the Vampire Slayer'? In which TV series is Willow Rosenberg a main character? Who played Angel in 'Buffy the Vampire Slayer'? Who played Ally McBeal in 'Ally McBeal'? Who played Dawson Leery in 'Dawson's Creek'? In which TV series is Dawson Leery a main character? Who played Joey Potter in 'Dawson's Creek'?