Chainsaw Sisters

The Bella Sisters were a group of siblings who became ganados after Los Illuminados cult implanted them with Las Plagas.

They wielded red chainsaws and wore bandages completely covering their heads. Like Dr. Salvador, they could be outran.

One of the sisters confronted Ada Wong on her search for a way into the Church. A second sister confronted her near the caves on the other side of the valley. Two other sisters joined together in a camp where they attacked Leon S. Kennedy. However, Leon managed to kill them both.

Trivia

 * The first Bella you fight in order to get the Green Catseye (In Seperate Ways) has a yellow chainsaw instead of a red one.
 * The name Bella, meaning "beautiful" in Spanish, and their bandaged faces both suggest that the four siblings were once attractive, until they were severely mutilated. It is unknown how they received these injuries and whether it was before or after Plagas infection.
 * It is unknown whether or not the two sisters fought in the main game are the same two that appear in Separate Ways.
 * There are also two Ganados who look almost exactly like the sisters, without the deformed faces hidden under bandage: Isabel and Maria
 * The Bella sisters, when coming in for a swing, are slightly faster than Salvador, thus if you're a few feet ahead it generally won't help much.

The Mercenaries
They appear in the mini-game The Mercenaries in the Village map. The player must kill the two to receive bonus points.

Unlike the other sub-bosses you encounter in other maps, the Bella Sisters appear more than twice. As your score rises, the Bellas will spawn faster and faster, and if your score is very high, you can even end up fighting more than 4 at once, so be careful. Also, they like to attack in groups and attack in the barn which is boarded up in story mode.

This is the only boss that is susceptible to HUNK's Neck Breaker ability after a head shot.