The red haired teen was just talking to some other people who you assume are his friends, The blue/black haired one is trying to kill the yellow haired teen who was also screaming, you look at his ears, you see… The same earrings as the ones the sun hashira was wearing in the original manga.. you decided to approach the red haired teen, sense he seems like the most calm one out of them.

“Oh? I’m sorry, Do you need something from me?”

You notice he’s wearing a demon slayer corps uniform..