"TRY IT AGAIN, CASEY!" Papyrus insisted, wringing his hands slightly as he looked over his puzzle. "I FIXED IT!"
"Are you sure?" Casey asked gently. She had been trying to complete another of Papyrus' X's and O's puzzle, but the past three attempts had failed to lower the spike square it was connected to.
"I'M ABSOLUTELY CERTAIN! IT WILL WORK THIS TIME, I'M SURE OF IT!"
"Alright then." Casey replied. She stepped on each X, six in all, and turned them into O's. She stepped on the button, but... Nothing happened.
"I-IT'S STILL BROKEN?"
"I think so, Paps."
"I... I'M SUCH A FAILURE! I CAN'T EVEN GET MY OWN PUZZLES TO WORK!" Papyrus exclaimed as he stomped his foot, tears in his eyesockets.
Casey walked over to the skeleton that was almost as tall as she was and lightly placed her hands on his shoulders. "Papyrus, look at me."
Papyrus gazed at her, wiping away a few tears. Casey tended to stick to calling him a nickname, she usually didn't call him by his full name.
"Listen, Papyrus. I don't want you to ever call yourself a failure, okay?"
"BUT CASEY-"
"I know the puzzle won't work, but that isn't a big problem. It can easily be fixed, you just need to figure it out. But, you're not a failure, you're the greatest monster I know."
"T-THE G-GREATEST... MONSTER?" Papyrus asked, sniffling.
"Yes. You're really kind, you like to try making everyone here happy, and you always try your best to help anyone or do what you're told to do... Kind of like a superhero."
"A SUPERHERO?" Papyrus echoed.
"Yeah, a superhero." Casey says with a faint smile. "C'mon... The Great Papyrus, why don't we ask Toriel for help with fixing the puzzle?"
Papyrus took her hand and let Casey lead the way to the door. "THE GREAT PAPYRUS? I LOVE IT, CASEY! I AM THE GREAT PAPYRUS!"