This is a really specific question. I tried searching but finally decided to just ask.
My WIP has 3 POV characters but one who is emerging as THE main character. However, the novel starts with another character's POV.
Is this okay? Or should the book start with the primary main character? He is introduced at the beginning of Chapter 2 as it stands right now.
Well, let's see ... what's the purpose of The First Chapter?
It's to let the reader kinda know what the story is sorta about, I'd think. Sorta letting the reader know what type of characters
inhibit inhabit (sorry, a Freudian slip, me thinks) that world, and might let the reader start to get familiar with the MC that the reader will probably be spending the most time with (or inside of).
Ya know, lettin' the reader know if this book if for him. To give the reader an opportunity to put the book down right away because he knows that this book, and/or MC, is not for him for an entertaining read. And to keep the reader who would like that kind of story and that kind of MC.
Ya know, sorta like using the First Chapter to also be a "filter" of sorts. It filters out the readers who aren't your targeted audience, and to keep those readers who would like the rest of your book.
Wait. ...

... I forgot. We be competitors!
So ... So ... So, of course you can start with another character, one that isn't the MC!
Yeah, yeah. Even, yeah, maybe pick a character that is kinda different from the MC who will have most of the reader's time and attention in the rest of the novel. Yeah, start with a character that will chase away the readers that would've liked your MC. And then, when a reader does like that "starting character," have the reader then run into the MC, a character which hopefully that reader won't like too much, so he then gets chased away, or better yet, that reader bought your book and gets disappointed by your MC, since he feels he got misled by the first chapter, and the reader then writes a "review" and he happens to work for a reviewing type magazine with national exposure.
And then ... What? ... why you all looking at me like that?
Don't be all a hatin' (at me). The OP is our competitor! And there are only so many 5/8'' slots on the bookshelves in the book stores. So one less competitor's book will give the rest of us a better chance for one of them slots.
You all should be thanking me, ... as I'm being a "team player" ... trying to help all of us out (except for the OP) ... Yeah, I'm trying to be a nice guy.
Where am I? Uh, oh. I'm in the wrong place. I don't hang out here, guess I better go now. I'm feeling better. Really I am. I'll just go now.