I haven't played Crestoria because gacha, but I'm guessing Kanata's a bum in Tales lead standings then. Most Tales characters would wipe the floor with anything Halo had to offer, they kill gods on Tuesdays while picking up the dry cleaning lol.
In my case, Leon (Resident Evil 4) would be making 'that' trip to Seattle seeking vengeance. Given how he has mini-meltdowns when Luis and Mike die in his game, a pair he probably met for 30 seconds tops, he isn't going to be coping with the emotions in TLOU2.
'Noooooooooooooooo'
Most Tales Of "gods" ain't shit next to The Gravemind. The only thing on a par above the Gravemind is Papa Nurgle. And I doubt any Tales Of characters are remotely capable of taking on Papa Nurgle.
The Gravemind is an eldritch-god with ambitions on a universal scale. It took the sacrifice of an entire galaxy's life just to slow it down for about 50,000 years with it being stuck in an exceptionally flimsy prison. The only way it was "permanently" stopped was by luring it completely out of the Milky Way Galaxy into the void and trapping it there, where it still was effectively only slowed down as far as we're concerned going by Halo Wars 2.
Yeah good luck to any JRPG protagonists in general being anything more than a fly to The Gravemind.
Gravemind is powerful sure, but I would assume if you flipped characters they would seal it in the same way Chief did in Halo 3. And the Covenant goons wouldn't mean much to most JRPG protags.
Meanwhile there are Tales villains who can do shit like destroy any form of matter and recreate it however they like and the heroes of those games (a couple of which can also do the above destroy and recreate any matter) straight-up fight and defeat them, so I still assume the power scale in Crestoria is fairly low in Tales reckoning if Chief mops up easy there.