Setsuna is a desktop application for reading Japanese text.
Setsuna does not collect or store personal user data.
All user data (settings, dictionaries, etc.) is stored locally on the user's device.
If enabled, Setsuna may store application data in the user's Google Drive AppData folder. This data is private and not accessible to others.
No user data is shared with third parties.
If you have questions, contact the developer via GitHub.