Why are All the Members of My Chat Group Characters Fictional Characters?

Good news: Ember has transmigrated. Bad news: It's Dark Souls 3! Thankfully, there's a chat group, but something's off about his chat group! Kevin: What savior warrior? I'm just a working-class guy who just moved to the Golden Courtyard. Doctor: Holy crap, wasn't there supposed to be girls? Why is it a mysterious masked man opening the coffin? And from now on, don't call me the Doctor of Rhodes Island, call me a college student from Reunion. Star: What pioneer? I don't know, I'm a staff member at the Black Tower Space Station. Ember: ...Holy crap! Why are my chat group members characters from side stories? Something doesn't feel right. Let's not even talk about whether these guys can help him beat Gundyr. The problem the four of them are facing now is: a rainy night, an overpass, and a Maybach. Looking at the figure riding a tall, magnificent horse ahead... Ember: ...Your chat group is better off not being here. But...since we're already here, he'll have to step up. Let that guy riding a horse on the highway see what immortality is! Ember: Do you think you can kill me?!