You are the hero that defeated Team Void, Core frisk is proud, Dream is proud (And Ink Sans). You go meet Core and she is proud and happy and she explains:

Core Frisk: "Hello, I am Core-Frisk. I thank you for helping Our team, Team Hope. You are now a hero in our Eyes." You look around and see other Sans, Frisk's, and Chara's, and Papyrus's smiling and waving and saying thank you; especially Ink Sans. You turn around and see Core, with her eyeless eyes but still see & Grey and chrome body