Комиксы, манга, сообщество!

Serena is an NPC and behaves like an avatar.

Players have nothing to lose so they are not careful. They think and plan, but most of their plans are some variation on "Leeroy Jenkins!"
Just like Serena.
Paulina is probably wondering if Serena is an NPC with a really good AI or if she's an avatar being played by a game employee.
In either case, she does NOT like being second to an NPC.

She remembered Sasuke´s post about smart NPC´s... she´ll go back to that and connect the dots about Serena being the Amazon that was with Galador...

Yep... he mentions Galador. He says "she is with Galador".
And he even posts screenshots. It's a matter of Paulina to connect the dots, go check that thread, check the screens and see Serena.