>One of the side characters is a "Fan of a series stuck

>>50685469
Are your rails so iron clad that he knows whats going to happen regardless of player action

>>50685469
Put him in a setting where he's probably fucked anyway. Like Worm.

>>50685469
The ability to change shit is limited in most cases anyway. And then consequences from your changes change things further.

Nonetheless, it can be an amusing twist on the great wise sage or information broker concepts.

>>50685469
Make him do stupid shit that players usually do in the game.

>>50687762
This, use the butterfly effect to fuck with things. Using DBZ as an example. Maybe due to the PCs existing Goku kills Raditz without dying and since he doesn't die he doesn't get to train with King Kai meaning he isn't anywhere near as well prepared as he would be for Vegeta.

>>50690690
Even with Kaioken, Goku only survived because Gohan, Krillin, and Yajirobe dealt enough damage to force Vegeta into retreating.

In a one-on-one fight, Vegeta would've slaughtered him.

>>50690690
Or imagine that Goku dies during the King Piccolo saga for some reason.

King Piccolo dies when Raditz attacks Earth. Earth becomes a planet under Frieza's control... Roll credits. The end.

>>50685469
Their unusual behaviour attracts suspicion, or even prevents them from befriending "future allies" due to rubbing them the wrong way.

>>50690690
I think the Time Patrollers would keep you from messing with the Saiyan Saga for the sake of preserving Earth and the timeline.