Cooofio
Fandoms
Recent works
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Tempest by Cooofio
Fandoms: 鬼滅の刃 | Kimetsu no Yaiba (Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), Percy Jackson and the Olympians & Related Fandoms - All Media Types
24 Sep 2025
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Summary
A prophecy has arisen. Kamado Tanjirou, Agatsuma Zenitsu and Hashibira Inosuke aren't ready, but they have to be.
A coup the three unfurled.
A tempest to quell the world.In other words, this is a canon divergence AU of Greek demigods!Tanjirou, Zenitsu and Inosuke set in Demon Slayer, with some splashes of angst (because everybody suffers), fancy powers, too much sleeping on Zenitsu's part, and too much swearing on Inosuke's part.
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Search for Hiraeth by Cooofio
Fandoms: Batman - All Media Types, Batman: Under the Red Hood (2010)
22 Feb 2021
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Summary
Batman is a serial killer, Dick is dead, innocents and criminals have been killed, and Gotham once again drains everything from everyone.
So, going back in time and saving Dick?
If that makes Jason insane, then yeah. That’s Jason.
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Summary
Agata Katsuhira knew what was going to happen. He knew what he had to do. But how? ... Sonozaki had his answer. He had to die, and she held the key to the doors of death.
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"Why? This is the only way.""No! I can't let you do it!"
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An AU story of how Agata Katsuhira needs to die in order to save Sugomori City, and stop the Kizna Project once and for all, as the experimenters go too far.(This is written after Kiznaiver Episode 7 - "A Battle Touching Upon the Identity of the Pain that's Seven Times the Pain of One-Seventh of a Pain")
Series
- Part 1 of (Mainly Angst) Kiznaiver One-shots
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Summary
[ON HIATUS; REWRITE IN PROGRESS - March 13, 2020, Chapter 1 UPDATE - September 2nd, 2020]
Tsuna is the adopted son of Sawada Iemitsu & Nana. What people didn't know, was that Tsuna and his siblings were born 400 years ago with the Vongola First Generation as their guardians. After a tragedy happens with Tsuna's real mother, Tsuna is sent to the future by Vongola Primo himself. Despite the harsh odds, Tsuna grew to become one of the most famed hitmans in the underground world. Now, he once again has to gather his guardian, to take back what once was theirs, their parents...
Recent series
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- Words:
- 742
- Works:
- 1
Recent bookmarks
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With Honors and a Hyphen by uncorrectgrammar
Fandoms: Batman - All Media Types, Batman (Comics), Batman: Under the Red Hood (2010)
08 Jun 2025
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Summary
“Didn’t realize we were holding a gallery viewing,” Jason said, strolling toward them like he hadn’t immediately considered turning around. “Should I bring wine and tiny cheese cubes next time?”
Dick shot him a grin. “I was thinking flowers. Maybe a velvet rope.”
Jason snorted. “Some of us have seen a diploma before.”
“Some of us have one,” Tim said, glancing over his shoulder. “That’s . . . kind of the point.”
In which Jason gives Bruce a perfectly normal, perfectly heartfelt Father’s Day gift. It gets mounted in the manor’s busiest hallway like a trophy. Naturally, everyone has questions.
Bookmarked by Cooofio
01 Jan 2026
Bookmarker's Notes
Short and Sweet Jason and Bruce son-father one-shot!
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show me yesterday, for i can’t find today by indent
Fandoms: Batman (Comics), Batman - All Media Types, Under the Red Hood, A Death in The Family - Fandom, Red Hood: Lost Days, Red Hood and the Outlaws (Comics)
15 Jan 2019
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Summary
Then: The year is 2013. Jason Todd is alive, fourteen years old, and about to follow Sheila Haywood, his birth mother, into the hands of the Joker. All he wants is to save her life.
Now: The year is 2018. Jason Todd was dead. But now he's a nineteen year old vigilante about to take down the latest C-Lister rogue. Unfortunately for him, its a rogue that specialises in time-travel technology. And what starts as an easy takedown...ends as a time travelling phenomenon.
The two Jasons swap places.
- Language:
- English
- Words:
- 48,174
- Chapters:
- 25/25
- Collections:
- 16
- Comments:
- 1,551
- Kudos:
- 9,062
- Bookmarks:
- 2,243
- Hits:
- 144,549
Bookmarked by Cooofio
18 Aug 2025
Bookmarker's Notes
So so good - makes me tear up every time. Thank you, author, for blessing this fandom with this fic and your writing.
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the ship of theseus by zipadeea
Fandoms: Batman - All Media Types, Percy Jackson and the Olympians - Rick Riordan, Batman (Comics), Batman: Under the Red Hood (2010), Percy Jackson and the Olympians & Related Fandoms - All Media Types
27 May 2025
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Summary
“What do you think of the Waynes?” Percy had asked Annabeth the week before. “Seems like they’re in Gotham’s headlines all the time, and not always for great reasons. You think they’re involved with the mob or something?”
“The opposite, actually,” Annabeth had replied, a wry smile on her face.
“What’s the opposite of the mob?”
“In Gotham? What do you think?”
Percy’s eyes had widened. “No. No way. Bruce Wayne is such a goof, there’s no way--,”
“Wouldn’t that be the best cover, though?”
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Poseidon once told Percy he was his favorite son.
But he's not the only one.
Series
- Part 5 of how to co-parent your reckless demigod 101
- Part 1 of PJO/DC shenanigans
- Part 2 of if sally jackson has no fans then i am dead
- Language:
- English
- Words:
- 18,567
- Chapters:
- 6/6
- Collections:
- 52
- Comments:
- 483
- Kudos:
- 10,301
- Bookmarks:
- 2,209
- Hits:
- 116,587
Bookmarked by Cooofio
02 Dec 2024
Bookmarker's Notes
Jason as a demigod, and the author's amazing ability to tie both worlds together
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Summary
Phil will say that he’s rambunctious, and he might be right, but with Tubbo being one of the more excitable people on the island, it is so very transparent when a bit of it all has been chipped off.
Or: Tubbo is having a bad time and people notice and people care
Series
- Part 3 of hatt's q!tubbo works
- Language:
- English
- Words:
- 25,873
- Chapters:
- 5/?
- Collections:
- 2
- Comments:
- 142
- Kudos:
- 739
- Bookmarks:
- 102
- Hits:
- 10,168
Bookmarked by Cooofio
01 Jan 2024
Bookmarker's Notes
The eggs' concerns over q!tubbo when none of the parents do anything about it/notice - it's very sweet
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creation, haunted and holy by greenglowsgold
Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018)
09 Jan 2023
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Summary
When Donnie bonds with the Technodrome, it falls a little bit in love.
—and they don’t let go.
Series
- Part 1 of creation, haunted and holy
- Language:
- English
- Words:
- 20,927
- Chapters:
- 5/5
- Collections:
- 2
- Comments:
- 271
- Kudos:
- 1,241
- Bookmarks:
- 305
- Hits:
- 13,116
Bookmarked by Cooofio
28 Jun 2023
Bookmarker's Notes
this two parter series .... I teared up with the second part with the final line. Recommend reading! FYI not romantic, but a different and intense form of love