Wu.
He did because he pretty much blew up the world and ruined his friends' dreams and murdered people.
He didn't because his friends were trapped in a dream world anchored by their wishes, granted in a way that was kind of bittersweet.
He did because he didn't explain crap to his friends, or really (to my recollection) his guild. Kind of makes you wonder about them and why they were following along this crazy guy who thought their world was a fake.
It's complicated.