prototype design
A proof-of-concept design (usually not (officially) released to the general public), or a preliminary design (such as those appearing in animation pilots, or pre-serialization one-shots).
Notable prototype characters
- Bowser Peach (Super Mario Odyssey)
- Saver (Fate/Stay Night)
- Unused Character (Kill Me Baby)
- Akatani Mikumo (Boku no Hero Academia)