Sifu

With this boss everything is quite simple. I recommend coming to him with a weapon to block her kunai without causing damage.
In the first phase, she likes to spam her combos in all directions, so the easiest thing is to keep her at a safe distance and wait for a specific series of attacks that ends with an empowered low kick in a crouch (you need to remember this) - in this case, dodge to block ( ) + left stick ( ) up when an intensified blow passes and then immediately reduce the distance and pile on. The method is long, but as safe as possible.
In the second phase, you don't have to move at all. Learn her small set of attacks and press dodge on block + left stick in any direction in a timely manner. Due to frequent successful dodges, concentration accumulates very quickly, which helps to carry out effective combos in response.
Video guide (ru).

The boss is as simple as possible. We just learn the ability to hit in the groin (forward, backward, square) and take a katana with us to the Boss Fight. We slow down time and do an intensive sweep, then we hit with a circle, holding it, and then we just spam this one technique (forward forward cardat), she will not leave the stun and this way you can easily defeat her, in the second phase we do the same