Thought I could answer all of these. Lots of OC marriages and killings going on XD
There's actually gonna be a lot of villains ranging from average mean human to murderous animals. But given the ultimate villain is technically Alec(human), I'd marry him.
Ooh, hard one. I think writing the villain as the hero would actually work best, cause Alec is very redeemable in my opinion.
Depends on which MC (my other MC is a chicken for those who don't know). But I'd say I'd rather be Alec's mother, to balance out his father's meanness.
In regards to Friar, I'd rather be raised by his parents, whoever they may be, so I can replace him XD
Wizard! I love that Harry Potter schtick!
OC loses everything, cause I may be going down that path anyways.
That one is tough. I suppose kill the MC. I know you're thinking, which one, right? Alec's death would technically save the chickens, but hurt his survivng family. Friar's death (at the present moment) would not really change anything. Guess Friar's the one.
Kinda did the latter unintentionally (burnout/hiatus), but I'd rather start from scratch. Redrawing everything would be a little painful, but it would do a lot of good on catching eyes...Unless you mean rewrite the actual story to be completely different. I'd try, but I would not enjoy it XD
Compromised hero all the way! Friar needs to break his vows.
(I feel like these answers are projecting more of what I'm actually planning in my story, btw, but it's fun to tease.)
The villain, Alec, cause I think I know him the best. Although Luke is a runnerup and a few years younger than me 
Whew, that was a lot, and a lot of fun! Here's my WYR:
To save the (real) world, would you rather: sacrifice your MC? Or sacrifice your deuteragonist (secondary character, being their best friend/love interest, etc)?
For my cast:
Humans: Eh, Luke's kinda useless rn, so he's going, lol
Chickens: Sorry, Friar, your time's up. Bucky's too pure XD