AU my characters into your characters' canons!

This sounds fun.

Integra essentially takes Kiritsugu's place in the HGW, but actually runs off with Iri no matter what she says to deter her.

It's done. It's over.

Iri's a maid now

Illya learns fun new ways to use magic wires from Uncle Walter.

(I don't know how Illya exists in this universe, clearly it is due to the power of Shut Up)

LOOK, I'm sure the Einzberns could create a magic flesh dildo. It's fine.

Oh hey Integra gets to be even more like King Arthur!

literally one of maybe 5 halfway competent, well-adjusted adults in lys' guild that doesn't think violence and or stepford smiling is an acceptable response to hideous trauma

or possibly just a really effective town constable/inn matron supermom combo

Oh no both of those are really good.

Put her in the guild as an officer and basically make her the unofficial counselor.

the level of unaddressed misery drops by 20% overnight

Therapy! It's important!

even just dispensing mom hugs would help so much

Putting little notes in their lunches

"You're doing great out there!"

THAT'S PAINFULLY MOM

Kairi is a normal girl who has been hearing about the people going missing lately. It's hitting a little closer to home, and then suddenly her best friend Riku goes missing. She and Sora are then targeted by Falspawn, from the game PSO and are saved by a member of Earth Guide who informs them that they're targeted for their high Photonic Energy.

Kairi and Sora have the power to wield Photons, and manifest them into Avatar Arms. Which can battle the darkness.

Not only that, they can travel into the "Game" and defeat the Falspawn and help rescue the missing people. So it's a search and rescue mission to find all these missing people and find Riku before something awful happens. And it's a journey across multiple worlds meeting the various locals.

Well shit. That's... eerily familiar.

its literally the back-half plot of PSO2 the Animation XD

where some of the cast discovers they can jump into the "Game"

and they find out that abducted people are being kidnapped to be turned into a big evil monster

Kairi is probably so similar to Asuna, from backstory to red hair to getting a ~strange~ weapon as pactio with Negi that Konoka frequently compares the two

However, Asuna gets all the pranks

Konoka probably cheerleads Kairi into pursuing Sora/Riku

Konoka's a good