Great story so far

So, is Shirou also disguised himself as faunus? because if ilya claims to be shirou's sister and one has ear and tails and the others not it will warrant a question.
Anyhow, the story is good at this point. Please do keep it up.

Cool can't wait for more

Well, what can i say, its good. It have potential to be good, its not rushed and the grammar is good and not over the top. Well its still early but i hope future chapter will be as good as this one.

I tend to lurk more than anything else, but a review never hurt anyone...

Overall, this chapter was very good, and I feel your story has a lot of potential. I'm very interested in where you plan to take this, because it's not yet obvious. In regards to characterization, your depictions were spot on - some might say that Weiss was a bit too nice, but that your story is cognizant of that should be more than enough. It also sets the tone for some of Weiss' future reactions - just remember to be relatively consistent.

Good first chapter. Thanks for sharing. I look forward to more.

I loved it

Good start so far.

Mochiron, Dhaturas-San. Anyway, this story seems to have a lot of potential especially for one that's starting out for either fandom. A very prominent first impression on what you seem to be able to achieve. I'll surely be looking forward to future updates in the upcoming days hopefully, I'll be sure to pop-in every time there's a new notification coming from 'ya, 'ya here?

Hopefully, this original story comes into more light and revamps the feel of to update more Type-Moon X-overs in the future.

Just probably gonna repeat what other's said, this has a good start. Don't know how you're gonna steer the story but I'd love to read it.

I just hope this won't end up with just Shirou and Ilya being inserted into RWBY-verse. I'd be hoping for something like a butterfly effect. How Shirou and Ilya would end up affecting RWBY events.

From Ruby and Weiss' interactions, I think you're already on the point where Weiss was able to accept Ruby as a leader. So a little past Blake's admittance to being a faunus? Cause Weiss was able to approach Ilya, even if she was a faunus...

I don't know.

Hope you can create a plot that won't necessarily steer too far from canon but would at least make it a unique fic on its own.

The premise is good and the characters were fine for an opening chapter. It's too soon to tell how this story is going to go though. For instance, you'll have to find a way to link up Shirou with some of the powerful characters such that they have a role to play, otherwise they'd be side characters, which defeats the purpose of having a crossover.
As far as OOCness, you kind of have an out since there are so many Shirou Emiya's you can use as your muse. As long as you're consistent with Shirou's personality throughout the story, barring major plot that affects him, you'll be fine.

Ah sh*t this is really good. Kinda like high quality drugs - not that I've taken illegal drugs, I'm just assuming that yea... Great first chapter! Looking forward for more.

this is awesome story very original no going to beacon or joining a team. also which route is Shirou and Illya are from?

So far, so good I would say. Not much happened, but it is an introductory chapter so it's expected to be a slow start. I I like it, but can't really picture where it's going at this point and it doesn't resonate with me yet in a way I can't describe. There's doesn't seem to be an underlying goal other than to inject Shirou and Illya into RWBY. This could very possibly change as you write it, but as of now, I would say that it's a good story, which is well written but needs a touch of uniqueness. Something to elevate it above "just a crossover". I see in your favorite list that you know Fate: Shattered Moon, I really enjoy that story too. If you could somehow make something like that it would be great. Maybe I'm too early to cast judgment and you will start making this story great in the next chapters, but as of now, it doesn't catch my interest wholly.

continue!

The Idea is interesting. Wait to see why and how they end up in vale.