GRIFIIIIIIIIIIIIIIITH!

Okay is the an X-over because there's Rex Lapis and Venti from Genshin, especially the latter when he talked about a certain bard

You could still use the Idea, and possibly use a different Crossover with it. Specifically reusing Emilya into a different Crossover if you wanted.

I just imagine Emilya summoning [Sensei] from [Tenken] along with [Fran] the Catkin.

I don't know if you take Requests, but, I kinda want to see more "Shirou Emiya waking up in Illyasviel von Einzbern's Body" aka what I see as "Since I'm no longer Illya or Shirou, I shall call myself Chloe von Einzbern... I suddenly feel chills all of a Sudden for choosing the name for some reason.", kind of story like this, but in a few different Scenario's.

Like Chloe von Einzbern waking up in a Hospital in the world either in "Date A Live", "High School DxD", "Fate/kaleid liner PRISMA ILLYA" and so on, and tries to live a Normal life while secretly training both Shirou's and Illya's Skills, but still got dragged into the focal point of the World's events. For Example:

1. Chloe Enrolling into the same Class as Shido, whom she smells odd, and chase after him when he went into the different direction of the Shelter during a Spacequake, while keeping herself both unseen and unnoticed by him and any camera's, but sadly still got dragged into it due to the inherited E-Rank Luck, via the building she's hiding got destroyed, aka if she didn't jump away, she'd be dead, but it still plave herself into the open, giving her no other choice but either pretend to be a civilian or defend herself.

2. Chloe Enrolling herself into Kuoh Academy and quickly noticing alot of things, like the Invisible Barrier she sense the moment she pass the Gates of Kuoj, and the Scent she never knew coming from both the Student Council and Occult Research Club, but due to meeting Asia, she instantly got herself wrap into trouble, due to actually keeping her promise to visit Asia in the Church.

3. Enrolling to Homurahara Private Academy, a slight difference from Homurahara High that the Shirou part of her remembers, and meeting and becoming Classmates with the none Magus Shirou Emiya, to her shock, then, 1 day, Magical Girl Illya suddenly drop down where she is, as both look at each other, with shock from Chloe and Embarrassment Shock from Illya. To protect herself from Rin who planned to either kill her or erase her memories, Chloe summoned a Sword near Rin's Neck to shut her up, and sadly be dragged into Illya's Escapades.

I'm sure you get what I'm getting at. I mean, It's kinda hard to look for it, but I'm quite surprise on seeing this. I kinda want to see a Version of this as well where, she instead is in the same age as Louise and considered each other as Sisters, with Emilya helping her with her Problem with her Magic, with a slight Success, aka she only fails when she's too Emotional or too Concentrated, instead of relaxing and using the smallest of the smallest amount of magic she use, or use the same spell in 1 go but in Multiple Targets, while never increasing the magical energy, meaning, she still gain the Title of Louise the Zero. While in the summoning Ritual, I'm actually Picturing Emilya summoning a Servant, rather than a Familiar. Just imagine Emilya summoning Artoria who remembers everything in Heaven's Feel, with a few fragments of the other 2.

Did the Hoyoverse and Nasuverse just connect to each other? And somehow Halkegenia got involved?

"Did you do it"
"Yes."
"And what did it cost?"
"Everything."

Thats a straight up Infinity War reference.

Did the author play genshin impact?

All for the stuff that this fanfic tries to do, it's only interesting for people who never read a wacky crossover, otherwise this is pretty bland. But it does have a pretty good grammar tho.

This reads like a generic girls manhwa or manhua.

Strange Fake is what a grand ritual like a Grail War supposed to be.
It grants a wish. Also give a lot of prestige just for participating, lots of people would want it.
Iskandar was going to wish for ressurection, you'd figure lots of people would be interested.
The World of Mages is supposed to be a very dark place, original Stay Night, UBW and especially Grand Order is nowhere near as ruthless as it is supposed to be.
Heavens Feel gave a glimpse of the abyss
Zero dove deeper
Now Strange Fake is fully exploring the rabbit hole.
It is also finally involving Dead Apostles in a Grail War setting.

Came back to re-read this fanfic. Have to say it really gives a good feel on the head and eyes as I feel real relaxed reading it. And an idea just dawn up on me,
what if, during the Zero no Tsukaima Arc, Arthur and Emilya had a daughter, sent them to Tristan Academy, and here's the twist! That child, is a reincarnation of another Arthuria from a different timeline! XD

AND WHATS MORE INTERESTING? During her second year in Tristain, SHE SUMMONED A HUMAN LIKE LOUISE DID BUT THAT HUMAN IS ANOTHER INCARNATION OF EMIYA SHIROU! XD

How's that?! And to make it even more interesting, give this pair Shirou and Arthuria a different background. Like this Shirou is stronger and smarter, different from his other incarnations.

Make him somewhat like his Archer self where he is more serious and protective. And then he'll train Saito to make him stronger and more capable of protecting Louise.

Arthuria on the other hand, we'll make her unable to remember her past with Shirou and get her confused as to why Shirou is so loyal and protective of her becuz he knows who she is XD

Stella is a fine, lovable name for a girl, specially if she's the healthy outdoor type. ...preferably a DBG, too.

Thank you for your fanfiction.
It was entertaining, and giving the 'complete' tags and explanation why it's 'complete' give me some kind of feeling of closure, even though it's not really the end.
Wish you well on your job, and whatever your next project is.
Cheers!

Shirou Emiya doesn't need therapy?!
WHEEZE *SFX* dying of laughter