It's a fantasy role-playing game.

DM: You are Vax Vax'ildan, a half-elf rogue . You are the member of the famous group of adventurers. Previously, Percy then runs behind a pillar and hides. Delilah steps out of the smoke ready to attack, but sees only Trinket (wearing a Percy costume thanks to the Seeming spell) who was following Percy.
DM: You trust them both, and right now, they've made an aggressive action against the Briarwoods. The next one you see, you're probably going to go ahead and try to make an aggressive action.
Player: I'm going to do whatever you tell me. Were I to see her, the most important person to me in the world, act on Lady Briarwood, I'd be like, "What's up, that's Lady Briarwood, kill her?"
DM: You would try and attack her to try to convince her to stop the assault, probably.
Player: Okay, and I've seen Trinket and I've seen Scanlan?
DM: You've seen Percy.
Player: I've seen Percy?
DM: Scanlan you haven't seen yet. You're still inside this cloud. All you've seen is Percy. You didn't even see her strike at you, other than seeing the arrows flying in so you know it's her.
