[Crossover] The Crown-Rank Illumi

Illumi thought for a moment, then wrote this in his self-evaluation:

Illumi is a very good child. He's considerate, gentle, patient, respectful, very filial, and never likes to lie. Every beautiful word in the world can be used to describe Illumi Zoldyck.

Mori Ogai: "..." Conflicted.

Chrollo: "...You..." (sighs)

Shalnark: "...I have something to say, but I'm not sure I should say it."

Ging scratches his head: "Haha, as long as Illumi's happy."

Milleuki looks at the people above and fumes. "What's wrong with you all? Isn't that exactly what Big Brother's like? There's nothing wrong with it!"

011 was a Demi-Human test subject.

He had endured every pain the world feared and grown accustomed to the death the world dreaded.

Until he became Illumi Zoldyck.

Blurb two:

Illumi was woken up by the Yamata no Orochi in his head. He was in a terrible mood afterward, but the Yamata no Orochi was even more exasperated.

[You know your kid's gone missing, right?]

Illumi: ??? What???

Illumi frantically patted himself all over and discovered, to his dismay, that little Hisoka really wasn't on him. Unable to stay still, he leapt out of bed and started turning the place upside down to find the baby.

Illumi searched the room from top to bottom, rummaging through every corner he could reach. He even checked the toilet, but still couldn't find Hisoka.

Raising Hisoka! That's the main point! (And Naruto, too.)

(Friendly tip: You can skip straight to chapter two. The timeline in chapter one is a little confusing.)

Worlds currently crossed over:

Bungou Stray Dogs: Mori's rise to power

Hunter x Hunter: Some dealings with the Phantom Troupe before its formation and with various factions

Onmyoji: Snake is here

Gintama: The Kouka storyline

Naruto: I'm off to save the world, don't stop me

Bleach + Demon Slayer + Bungou Stray Dogs + Black Butler (?): I'm still working out the details for this setting.

My Hero Academia doesn't appear in the main story, but some characters might show up. Spoiler: My greatest love (and malice) toward My Hero Academia is sending the Phantom Troupe over there.

Fate/Grand Order: undecided

There's only so much room in the blurb, and there's a bunch of other content warnings in the author's note for chapter one. It's all rambling, so you can skip chapter one and start at chapter two.

I have a hundred thousand words saved up, so feel free to dive in. Look at those favorites. Yes, you. Click it. Click.

Theme: What if Illumi were a Demi-Human?