Ok but imagine if this was evolution-based or something and the kid ended up becoming this thing
one of the last common ancestors between the two of them. This also includes us, the wolves and cats, and any mouses
I'm sorry, man. That sword design is just shit... Impractical as hell given that arms don't float without bones and don't allow objects to phase through it.
Patent-making do be crazy with the tech shown in this... She can probably become the richest person given how many things in the modern world she could think of.
I mean, for world building this is already pretty great. I mean, when was the last time reincarnated characters have basically lived all of both lives?