This Seeking Tech guide will explain how you can defeat Carmelita without taking damage in Sly 3: Honor Among Thieves (2024) on PS5 and PS4.
Use the following video as a reference:
First Phase
For the first phase, you need to use Bentley to shoot at Carmelita.
If you managed to hit her, then she will fire back. As long as you stay away from the edge of the cliff, she won’t likely hit you.
Keep firing at her until you get a cut scene.
Second Phase
For the second phase, you need to pick up the exploding barrels and throw it back at her.
She will eventually throw multiple barrels at you. In this case, avoid targeting her and focus on getting rid of the barrels as soon as possible. You should get a few lucky hits here and there by throwing them back randomly.
Third Phase
For the third phase, you need to climb Carmelita and hang on both sides of the Mask of Dark Earth.
To avoid the gunfire, move in a zig-zag motion while rushing in.
Once you get close, jump on one of her shoelaces and then quickly make your way up to hang on the mask.
When you get knocked down again, target the other side of the mask to end the boss fight without taking a hit.