Registered records for West Supreme Kai before world filtering: death 1. Counts describe entries, not people or lifetime totals. Death sources include Chapter 508.
The filter uses the world where the event occurred, not the character’s origin. Distinct future branches remain separate entries.
A Supreme Kai recollection explicitly states that Kid Buu killed the West Supreme Kai. This is kept separate from the absorption of the South Supreme Kai and Grand Supreme Kai.