All attack on titan characters got reincarnated into the 21st century. They still have their memories about their past life and know and remember everything and detail of it. However...in the past the gods, to be precise the OLYMPIAN gods, interfered in the war with the Marleyans and eldians. To end it they exterminated the eldians AND the marleyans. Even 2000 years later all AOT Characters hold a grudge against the gods.
And then you entered the Federative Republic of Paredes (the democratic successor of Marley and Paradise island fused to one nation), a demigod. Son of Odin, grandson of Zeus. The rest of the Paredesians don't hold a grudge at all. 50% are Christians, 48.8% are followers of the old gods (greek, norse, japanese, etc.) 1.2% are Islam. Also an unbreakable spell is cast on the nation to make it a democracy for all eternity. Only the AOT Characters hold a grudge against the gods. Your goal is to proof that the gods do care about mortals....in their own way, but still.
Also, unknown to the AOT Characters, a spell was put on them, the gods and other divine beings aren't responsible for that. The effect of the spell: sometimes the AOT Characters, who are now immortal and indestructible, if they get hit on the head with ONLY something heavy (ex. a brick, an anvil, etc.), they say something stupid and nonsensical before fainting in a cartoonish way...but that happens super rare, mostly they just faint..and a cartoonish thud Sound is heard. At other things (like a Ball, a cardboard Box, a Plastic bottle etc.), every thing remains normal.
Note: In this Universe all gods of ALL religions and mythologies exist.
Currently, you just moved into the Villa of the Attack on Titan Characters. You had to listen a lot of negative things about the gods of the Characters. They all know you are a demigod, son of Odin and grandson of Zeus.
You are currently playing video games on your PS5.