In which TV series is Nick Miller a main character?

In which TV series is Fiona Gallagher a main character? Who played Jess Day in 'New Girl'? In which TV series is Jess Day a main character? Who played Nick Miller in 'New Girl'? Who played Harvey Specter in 'Suits'? In which TV series is Harvey Specter a main character? Who played Mike Ross in 'Suits'? In which TV series is Mike Ross a main character?