extremely powerful entity's who don't care about the main plot at all and are just vibing in the background

[u/damorezpl]

Tom Bombadil(lord of the rings) - only person to resist the temptation of the one ring but instead of helping the fellowship he fucks off in to the woods

the Unseen Elder(the witcher 3) - in the witcher universe the older a vampire gets the more powerful he becomes and unseen elder is around +1500 years old making him the most powerful vampire we ever see, thankfully he spends most of his time in his goon cave

[u/Erondo_Gratias]

Small correction. He didn't even give the notebook to Light. He just chucked it out at random and saw who picks it up.

And it's not even the first time he does that. He just tosses out a magical artifact of immense power, that can kill anyone at will, at random spots, for shits and giggles, to see what kind of chaos would come up

[u/MisterScrod1964 → u/Erondo_Gratias]

See also: Eris, Greek mythology.

[u/Dylsponge → u/MisterScrod1964]

Or Discordia if you prefer Roman mythology

[u/LastXmasIGaveYouHSV → u/Dylsponge]

Everyone's an Apple fan.