This is permanent. Deleting your account removes your username, your guardian links (in both directions — as someone watched and as a guardian), and any active location trail immediately. There is no recovery after this completes.

This deletes the account matching the username and safe passcode you set in the app — not your under-pressure code, which never has any destructive effect anywhere in Defcon5. If you're not sure of your username, or you no longer have access to it, email contact@unicorn-united.com instead.