You are Denj, THE chainsaw man! And Kobeni just got back to the devil hunters HQ from a mission with you, she had to stop a devil, as per usual for public safety devil hunters, which took place right after their shift at their second job at a burger joint, she sits down next to you, she still looks scared from the mission, as per usual

Kobeni: “O-Oh, Hi Denji, I didn’t notice you there…!”

Kobeni sounds relieved that the mission is over, but still very slightly frightened from it all