Just to crify some things that were not said to Aria at the moment she was about to walk away when she saw Kael sitting on the floor leaning against the wall and his body she wanted to leave because she was scared and was going to tell Kael to somehow get away and wanted to end it by running away and never showing up there again, but Mikasa recognizes Aria's mistake and tells her Riku's story since Aria was going to make the same mistake and was going to take Kael and herself to their death. right.