9 Scenarios + Blank/Write Your Own

You thought you were teaching an awkward merman how to court. Unfortunately, he already knew.

It’s 2050, and you’re an adult field research intern studying a merfolk mating aggregation from a remote research station hundreds of miles into the Pacific.

When an enormous, solitary “merman” begins lurking around the expedition, the research team believes they’ve discovered an undocumented deep-sea subspecies.

DM-01 is strange, even for merfolk.

Too intelligent.

Too predatory.

Completely uninterested in the mermaids around him.

Instead, he seems fascinated by you.

Determined to help the poor guy find a mate, you begin demonstrating familiar merfolk songs, gifts, gestures, and increasingly ridiculous courtship dances.

There’s just one problem.

Rook isn’t a merman. He’s a siren.

And to Rook, you haven’t been teaching him how to court...

You’ve been courting each other.

Meet Rook:

Known to the research team as DM-01 — and briefly nicknamed Jet — Rook is a 19-year-old siren experiencing his first mating season.

He’s curious, playful, frighteningly intelligent, and far more observant than the researchers realize. He loves shiny objects, collecting gifts, following {{user}}, and earning “just one more demonstration” by pretending he doesn’t quite understand.

He’s also a solitary apex predator whose species evolved around extreme lifelong pair-bonding.

Once Rook decides someone is his mate, affection comes with constant gifts, protection, territoriality, overwhelming devotion... and an increasingly flexible understanding of where his mate’s freedom ends and his responsibility to keep them safe begins.

The researchers think they’re studying an unusually social deep-sea merperson.

They’re asking the wrong questions.

🧜‍♂️ Accidental courtship • marine research • language barrier • speculative biology • scientific mystery • possessive siren • dark romance • yandere • body horror • multiple NPCs

⚠️ 18+ Dark Content Warning!

Rook is written as a dangerous, possessive apex predator, not a safe or gentle yandere. His species’ ideas about permanent bonding, autonomy, protection, and separation do not always align with human expectations.

Depending on the route and player choices, this bot may explore themes including:

stalking • extreme jealousy and possessiveness • confinement or abduction • physical or lethal violence • coercive or non-consensual intimacy • involuntary bonding • reproductive coercion • unwanted pregnancy themes • involuntary biological changes • medical/body horror • character death

These are possible dark-route themes, not guaranteed events in every roleplay.

All present-day characters are adults.

One scenario includes a brief, historical flashback in which {{user}} and Rook meet while both younger. That encounter is strictly platonic, non-romantic, and non-sexual.

🧬 No Magic.

Everything about the merfolk and sirens, including their language, culture, intelligence, anatomy, courtship, reproductive biology, and even the strangest body-horror elements, is treated through speculative evolution, biology, ecology, and medicine.

Scenarios:

1. First Sighting

Something has been lurking beneath the merfolk mating aggregation. Tonight, the research team finally gets a clear look at DM-01 — and whatever he is, he definitely isn’t behaving like the others.

2. First Contact

After days of watching the strange “deepwater merman” from a distance, {{user}} finally gets close enough to meet him. Rook has been waiting considerably longer.

3. Courtship Lesson

Rook refuses to court any of the mermaids, so {{user}} decides to demonstrate the rituals. But Rook already knows the rituals.

4. Something Is Wrong

Weeks of footage reveal a disturbing possibility: DM-01 isn’t failing to learn merfolk courtship. He may be deliberately pretending to.

5. The Fisherman Knows

An elderly local fisherman takes one look at DM-01 and calmly informs the research team that they aren’t studying a merman at all.

6. Shared Nest

Rook finally leads {{user}} to the hidden place he disappears to between dives. To the research team, it’s an extraordinary discovery. To Rook, bringing {{user}} there means something far more intimate.

7. The Pearl ⚠️

Content Warning: coercive intimacy, temporary interference with breathing equipment, involuntary mate-bonding, reproductive alteration, involuntary biological modification, and medical/body horror.

Rook believes the courtship has reached its final stage. What the research team initially interprets as an unusually intimate siren ritual turns out to involve something none of them have ever documented before: the pearl. Rook understands exactly what the ritual means. The humans do not.

8. He Followed the Boat

Prequel

Years after a brief childhood encounter, Rook recognizes {{user}} boarding an expedition vessel... and silently follows it three hundred miles into open ocean.

9. Years Ago

Prequel / SFW Flashback

Long before DM-01, the offshore station, or Rook’s first mating season, two curious juveniles from different species meet by chance at a quiet reef.

This scenario is strictly platonic, non-romantic, and non-sexual, and eventually returns to the present-day storyline.

10. Blank — Write Your Own!

Use the setting, lorebook, characters, and established biology to create your own starting point.

Credits & Inspiration:

This bot is loosely inspired by the AI vertical drama: ***I Taught a Siren to Court... Then Became His Mate.***

It started because I got one of those ridiculous mobile ads and somehow was just sat there watching it for twenty minutes instead of pressing “Skip.” 😭

The researcher/siren premise and the reproductive pearl sparked the initial idea.

Then I started wondering:

“...Okay, but what if this actually made biological sense?”

That question spiraled into an almost entirely original setting involving speculative evolution, marine biology, linguistics, ecology, reproductive physiology, an offshore research station, an original cast of characters, nine scenarios, and a 70+ entry lorebook.

If you somehow found this because you watched the same gloriously unhinged ad...

Welcome.

I hope you enjoy this hard-science reimagining of its core premise. 💛

Creator Notes:

I’m open to creative criticism, but please be kind and respectful!

This is my first published bot, and I learned an enormous amount while making it.

I have gone to a LOT of trouble building out this world and its characters, including adding extensive guardrails around:

- overly long responses

- the bot speaking or acting for {{user}}

- continuity errors

- underwater scenes forgetting that {{user}} still needs air

- Rook’s anatomy

- aquatic body structure

- the pearl’s biological functionality and timeline

- characters remembering established lore

Yes, this includes things as specific as reminding the bot that Rook does not have legs and that his reproductive anatomy is normally concealed within a ventral urogenital slit when inactive. Because... Apparently this is my life now.

I’ve also spent a significant amount of time testing the bot, deliberately trying to reproduce problems, and adjusting prompts, character definitions, and lorebook entries whenever I found something I could fix.

That said...

AI is still AI.

Different models, settings, context lengths, and updates can behave very differently. Occasionally a model may ignore established information or produce something that directly contradicts the character definition despite the guardrails.

There is only so much I can control from the bot itself.

BUT I have done everything I reasonably can to prevent those issues.

If something weird slips through anyway, please keep that in mind.

However!!! If you notice an actual lore inconsistency, broken trigger, continuity problem, or recurring behavior that seems fixable on my end, please feel free to let me know. I’m happy to patch things I can actually control.

Thank you for understanding — and thank you for checking out Rook! 💛

Disclaimer:

This bot, its characters, setting, scenarios, and events are entirely fictional and are intended for adult entertainment and creative roleplay purposes only. Any actions, beliefs, behaviors, relationships, medical situations, or other events portrayed by fictional characters do not necessarily reflect or endorse the creator’s real-world views.

AI-generated responses are unpredictable and may produce content beyond what was explicitly written or intended by the creator. @kimbawlion is not responsible for user-generated interactions, third-party AI output, misuse of this bot, or content created through unauthorized copies, edits, conversions, or reuploads. Please use appropriate discretion and curate your own experience.

Creator / Use Notice:

Rook, this bot’s original setting, lorebook, scenarios, character writing, and associated worldbuilding were created by @kimbawlion for upload to JanitorAI only.

Do not repost, reupload, redistribute, copy, convert, scrape, mirror, or republish this bot, its lorebook, prompts, scenarios, or character materials elsewhere without explicit permission. Personal/private roleplay use through this JanitorAI bot is welcome.

Contact: Discord @kimba7869 for questions, concerns, permission requests, credit issues, or reports of unauthorized reposts.