This is a relatively easy trophy, this is playing as Momohime who is extremely fast with her weapon and still a bit strong at least in this stage of the game. At the end of the prologue, Momohime will fight a large man.
You may want to try to earn
in the boss battle, as the boss is very predictable.
After the battle there will be a second discussion scene where the player has to talk to everyone then hit x to proceed at that point. Once you proceed you'll get the trophy to pop.
This is the same map as
but a different boss