Reaper POV
So, after going through all my books... No, there never was a case of someone surviving the grim reaper's touch before. Geno is truly special.
I should ask Tori though... Maybe she tried to create an immortal life. I think she would have warmed me, but who knows ? I teleport to see her.
Reaper : Hey, Tori... How are ya ?
Life : I am fine. But you look like Death.
Reaper : Why, thank you.
Life : No, Sans. What is wrong ?
Reaper : ... I... Met someone. Someone immune to my touch.
She looks stunned. She didn't know it was possible neither, huh ? Well, she quickly went to a happy face, though.
Life : It is a great new for you.
Reaper : Yes, but this is still weird... But thanks for being happy for me, Tori.
She smiles at me and after some more talking I leave. I decided to ask Gerson if he saw anything like that before. I mean, he is one of the oldest, if not the oldest, and the wiser one of the gods, so...
Gerson : Oh Sans. What brought you here ?
Reaper : Gerson. Have you ever heard of an immortal mortal ?
Gerson : Hm ? There are legends of it in the mortal myths, but that shouldn't exist. They are mere fantasy. Why ?
Reaper : ... I met one. I hugged him, but he survived.
Gerson : This is weird... I think Alphys and Gaster won't know much either... But you can still try with them.
I nod. Like predicted, they don't know. Alphys got over excited though. As for Gaster... He was unpleased, when he heard I didn't try to slash him with my scythe... Should have expected it.
I sigh and leave for a bit. While floating around AUs, I float into Ink. He is drawing and humming to himself.
Reaper : Hey, Ink. How are you doing ?
Ink : Oh, Reaper. I am fine. Is there a problem ?
Reaper : ... Yeah... Are there some Sans who are immortal ?
Ink : Hm... You, Dream, Nightmare... I dunno if Error and I are immortal, but we are hard to kill. I guess if we are in Killertale, Killer would be. Oh, and maybe Geno ? I am not so sure about him. Why ?
Reaper : I was supposed to reap Geno.
Ink : Oh.
Reaper : ... He is immune to my touch.
I sigh. I really don't want to kill him...
Ink : I see. Well, I got my answer.
Reaper : Thanks for answering me.
I teleport back in my AU and lay on my bed to get some sleep...
Instead, I heard my brother burst my door.
Papyrus : OH MY ASGORE ! SANS ! I HEARD YOU MET AN IMMORTAL MORTAL ! HOW ARE THEY ?!
I groan and turn to him.
Reaper : Sup, bro.
Gaster : Oh, you are both here, great.
I sit down immediately and Papyrus turns to face Gaster.
Gaster : Sans, we discuss with Gerson and Alphys. We think we should see that mortal you told us about.
Papyrus : WOWIE ! CAN I COME TOO ?
Gaster : If you want, Papyrus.
Reaper : Wait. I am going to ask to Ink if he could get the goddess of Life too. She could know something you don't, no ? Since her power opposes mine.
Gaster : ... Fine.
I mentally sigh in relief and teleport to Ink. He was still drawing, so he wasn't hard to find. I explain the situation to him.