There are five playable characters in The Mercenaries. Whe you first unlock The Mercenaries, Leon S. Kennedy will be the only player you can use. Get at least a four star rating on each stage to unlock another character. Each character has a specific amount of health, certain weapons, and special melee attacks.
Leon is the only character initially available in Mercenaries. He has nearly 8 cells in his Health Meter. Leon's special (melee) moves are the Kick and Suplex.
His weapon cache includes:
In order to unlock Ada, you must first beat Village with Leon with at least a four star ranking.
Ada Wong is a tough character with tons of weapons. She has the Fan Kick as a melee move and 6.5 cells of health.