Memory Transference

[KageTokage]

Alchemist 50-60 questline also involved transferring consciousness between bodies. It's apparently something the alchemists of Radz-at-Han can do, although it's also stated to be a nearly-impossible technique available only to the most skilled and least ethical of alchemists.

I forgot about that particular quest since it's been so terribly long.

It seemed more like a proper soul transfer as opposed to simply overriding someone else's memories, though, as the "color" of the offending alchemist's soul (Which is another concept that ended up coming back much later in Shadowbringers) matched that of the body he overtook.