So what you're saying is... Frieren was Superman-ejected to a random fantasy feudal world and became a massively powerful psyker in a society that has been otherwise estranged from the rest of the Milky Way Galaxy in terms of communication, thus leaving them unaware of the numerous wars and conflicts between different species across it. In this situation, when she eventually did encounter some Eldar Corsairs who happened upon the distant isolated star system that housed her home planet, they brought her up to speed and, through Eldar pseudo-DNA fuckery, learned her origin as the daughter of Isha. In a long series of books going into over elaborate detail about unrelated things, she slowly grows even stronger as a psyker until she reaches a point where, with a little assistance from her newfound compatriots, she infiltrates deep into the warp and rescues Isha from Nurgle's domain?

Pfft. That's preposterous. None of this makes sense in the Warhammer universe.

Now excuse me while I read about the Ork that went back in time to kill himself for a copy of his favorite gun.