The inspiration for this post comes from @WongBrawl 's comment and a bunch of Riordanverse characters X Games posts. So here goes nothing:
Percy:
Stays in his father's element the whole game, the rivers.
When he gets tired of swimming he fishes or drives around in his boat, with Annabeth at his side.
Equips all his blue cosmetics.
Annabeth:
Amazed by the different types of architecture.
Spends time with Percy.
Jason:
Mostly glides around
When he has to land, he flies around in a Choppa.
Keeps his cool in a fight, and wins.
Gets headshotted multiple times ( wink wink )
Piper:
Charmspeaks players through her headset.
Not the best fighter
Leo:
Knows how the weapons work
Builds a fort at in 1 second.
Delighted with all the different mechanisms.
Customized the controller and hacked the game.
Hazel:
Uses her powers to get the gold loot.
Gets frustrated because she can't use her underground powers
Frank:
Tries to protect Hazel
He gets clumsy in fights and gets eliminated.
Shouts out some "Darn its"
Thanks for Reading! Let me know how it was in the comments. I might make another one with other characters (Nico,Will,Meg,Apollo) if this gets popular.