How do you unlock the irl in Resident Evil 4?

To unlock every character in Resident Evil 4, perform the following:

Ada Wong: Get a four-star rating in the Pueblo map of The Mercenaries

Jack Krause: Get a four-star rating in the Castle map of The Mercenaries

Hunk: Get a four-star rating in the Island Commando Base map of The Mercenaries

Albert Wesker: Get a four-star rating in the Waterworld map of The Mercenaries