That feeling of having your foundations ripped away? It's the ultimate crucible for forging a character’s core. I’m less interested in the immediate grief—though that's valid—and more in the weird, specific neuroses it breeds. A character from a lost world might develop an obsessive relationship with certain textures, smells, or songs that are now extinct, a tactile memory no one else can share. Their humor becomes untranslatable, their references nonsensical. It creates a permanent, low-grade alienation that can't be solved by finding a new home, because 'home' as a concept is a phantom limb.
You see it brilliantly in science fiction like the later 'Ancillary Justice' books, where a character’s entire civilization and sense of self were systematically erased. Their development isn't about becoming stronger in a traditional sense, but about constructing a new identity from scavenged fragments, often with a deeply cynical or eerily detached outlook. The loss isn't a backstory event; it’s the ongoing condition of their existence, shaping every cautious alliance and moment of withheld trust.