Quote Originally Posted by Shinwa Tsuki View Post
many types, one continent, one person.
I'm going to guess it is a monster that is humanoid in form... I don't know which one would work... The second line makes me think the answer is around Midgar.

many beasts, one area, forever.
A monster that you can fight in this one location - for the entirety of the game {forever}.

satan's angel on the ground
This strikes my as Midgar Zolom (Spelling?).
you got several parts of it correct, and you spelt midgar zolom right, but that is not the correct monster.