@C_M_O_TDibbler
Yeah this sounds really close to the Primarch story or more like a human coming from the dark age of technology into a feudal world but in this case MC is not torture to death and the A.I of the ship not going crazy and never want to help humanity again.
It looks like the elf realized that she probably won't be able to go with him so is trying to deal with her soon to be heartbreak. Or she is going use some magic fuckery to get to the mc world.
I just greatly dislike it when author introduce a character then immediately kill any progress with a slide of who they will become in the future with the mc . That is a flag that the author is either a noob or just sucks.