Mermaid Simon AU

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Listing Series

• Deals in blood still count (even if it's selfish and you made it with the enemy) by Asgeryos

  Fandoms: Iron Lung (2026), Project Hail Mary (2026)  

  • Teen And Up Audiences
  • Creator Chose Not To Use Archive Warnings
  • M/M
  • Complete Work

  01 Aug 2026

  Tags

  • Creator Chose Not To Use Archive Warnings
  • The Convict | Simon (Iron Lung)/Ryland Grace
  • The Convict | Simon (Iron Lung) & Ryland Grace
  • The Convict | Simon (Iron Lung)
  • Ryland Grace
  • Rocky (Project Hail Mary)
  • mermaid au
  • Amputee The Convict | Simon (Iron Lung)
  • The Convict | Simon Lives (Iron Lung)
  • The Convict | Simon Has PTSD (Iron Lung)
  • Mutated The Convict | Simon (Iron Lung)
  • Ryland Grace Is Not Graceful
  • Touch-Starved Ryland Grace
  • Ryland Grace and Rocky are Platonic Soulmates
  • ONE singular Coltland twins mention
  • Unreliable Narrator
  • Mild Blood
  • Pre-Relationship
  • Kind of freaky Ryland Grace
  • First time tagging my bad bro
  • POV The Convict | Simon (Iron Lung)
  • Mermaid The Convict | Simon (Iron Lung)
  • The Convict | Simon Has Trust Issues (Iron Lung)
  • The Convict | Simon (Iron Lung) DOESN'T think Ryland Grace is an angel
  • in fact he thinks he's insane
  • Miscommunication
  • First Meetings
  • Simon will do anything to live
  • Dubious Science
  • yokese no soi 100tifiko el fic
  • Religious Imagery & Symbolism
  • English Is Not the Author's First Language
  • Assumptions
  • A lot of them - Freeform

  Summary

  Simon may have lost most of his humanity to the blood, but he wasn't going to lie down and wait for his demise.

  He would fix things, he would redeem himself of his sins and, most importantly: He would be on his best behaviour until possibly-a-COI-scientist Ryland Grace and his totally-not-another-murderous-alien Rocky help him get out of AT-5.

  Don't mind his lack of legs and excess of scales and fins, that's a problem for another day. Also don't mind the fangs peeking out of his face and his claws. He's 100% safe to board the Hail Mary, trust. :)

  Series

  • Part 1 of Mermaid Simon AU

  Language:

  English

  Words:

  19,776

  Chapters:

  1/1

  Comments:

  34

  Kudos:

  231

  Bookmarks:

  37

  Hits:

  1,649

• Treading bloody waters (Aka I turned Simon into a mer and made it everyone's problem) by Asgeryos

  Fandoms: Iron Lung (2026), Project Hail Mary (2026)  

  • Teen And Up Audiences
  • Creator Chose Not To Use Archive Warnings
  • M/M
  • Work in Progress

  13 Sep 2026

  Tags

  • Creator Chose Not To Use Archive Warnings
  • The Convict | Simon (Iron Lung)/Ryland Grace
  • The Convict | Simon (Iron Lung) & Ryland Grace & Rocky
  • The Convict | Simon (Iron Lung)
  • Ryland Grace
  • Rocky (Project Hail Mary)
  • mermaid au
  • Mermaid The Convict | Simon (Iron Lung)
  • Siren The Convict | Simon (Iron Lung)
  • I still dont know the word for him lmao
  • Amputee The Convict | Simon (Iron Lung)
  • Mutated The Convict | Simon (Iron Lung)
  • The Convict | Simon Has PTSD (Iron Lung)
  • The Convict | Simon Has Trust Issues (Iron Lung)
  • Ryland Grace Is Not Graceful
  • Touch-Starved Ryland Grace
  • Ryland Grace and Colt Seavers and Sierra Six | Courtland Gentry Are Siblings
  • Eden is a Cult (Iron Lung)
  • Canon-Typical Blood (Iron Lung)
  • Canon-Typical Body Horror
  • Slice of Life
  • The Convict | Simon (Iron Lung) DOESN'T think Ryland Grace is an angel
  • Dubious Science
  • Fluff and Hurt/Comfort
  • Teacher Ryland Grace
  • i will update the tags as it goes bc idk what to put in here
  • Made up Eden lore (Iron Lung)
  • Ryland Grace Has PTSD
  • Simon and Rocky are friends
  • Yeah you have to take that one from my cold dead body
  • Ryland Grace Has Anger Issues

  Summary

  Finding a highly mutated human on that weird blood moon has proven itself to be a challenge as Rocky and Grace adapt to their new routines and their new crewmate’s singularities.

  Simon is just glad these two don’t seem eager to use him, he can work on his trauma and “supposedly not dead universe” concept later.

  ________________________________________________________

  This work will be multichaptered and will feature instances in my Mermaid Simon AU, that will have a continuity among them but can be read separately.

  It’s just me sticking them in situations, either related to their relationship or Simon's new lifestyle as they all adapt after being alone for so long.

   

  Series

  • Part 2 of Mermaid Simon AU

  Language:

  English

  Words:

  7,406

  Chapters:

  1/2

  Comments:

  6

  Kudos:

  15

  Hits:

  50