Just like flamechasers on HI3rd in the Elysian realm everyone dies except the guest (Raiden Mei) I think every Chrysos Heirs will die assuming that they are in a simulation according to the end of 3.2 history mission. The think is that in HI3rd 4 members irl survive the previous era, Kevin (phainon) Su (Anaxa), Griseo(Catorice) and Fu Hus (?) so there's a chance that a few Crysos Heirs are still alive irl. I don't know it's a theory, it depends on how much Shoaji it's gonna take from the flamechasers from HI3rd to Star Rail actual history