This is the biggest debate in the Fallout community. If you play through her story in a repack or the retail version, the evidence is surprisingly thin on both sides:
Regardless of the version of the game you have, saving Kasumi is the "good" ending for her character arc. Kazumi Nakano REPACK
If you are searching for "Kazumi Nakano REPACK," you are likely looking for a way to play her story without downloading the massive 90GB+ file that a fully updated Fallout 4 requires. Repackers like or DODI are known for creating these high-compression installers. Benefits of a Game Repack: This is the biggest debate in the Fallout community
: Kasumi is a talented mechanic who becomes convinced she is a Synth —an artificial human—after repairing a radio and contacting DiMA, the leader of a Synth colony called Acadia. Repackers like or DODI are known for creating
: She has vivid "dreams" of waking up in a lab, and some unique Synths (like Glory) also don't drop components upon death. How to Save Kasumi Nakano
Kasumi Nakano is the "MacGuffin" character of the Fallout 4: Far Harbor DLC. Her disappearance from the Nakano residence in the Commonwealth serves as the inciting incident that draws the Sole Survivor to the mysterious, fog-covered island of Far Harbor.