: A character suddenly changes with no explanation whatsoever.
- Straight: Bob, formerly a Nice Guy, suddenly starts kicking the dog and becomes a huge Jerkass.
- Exaggerated: Bob, formerly Incorruptible Pure Pureness, becomes a Complete Monster.
- Justified: Bob has split personality disorder.
- Inverted: Static Character
- Bob, the resident Nice Guy, seems to have become a Jerkass. However, it turns out that it's actually Bob's identical twin brother berating everyone - Bob himself is just as nice as ever.
- Character Rerailment
- Double Subverted: However, it turns out that Bob has secret evil plans, and his kindness is merely a facade.
- Parodied: Bob constantly switches between The Hero, Big Bad, Anti-Hero, Anti-Villain and various other roles in the course of a single episode/book/game.
- Zig Zagged:
- Averted: Logical Character Development takes place in the course of the work.
- Lampshaded: "Bob isn't how he used to be, is he?"
- Invoked: "I'm going to be a changed man!"
- Exploited: ???
- Defied: ???
- Discussed: ???
- Conversed: ???
- Deconstructed: Fans who liked Bob's previous characterisation resent his changes so much that they abandon the show entirely.
- The writers decide to return Bob to his previous characterisation, thus restoring the work to its former glory.
- Alternatively, fans begin to see the merits of Bob's new personality as well, and thus start watching again.
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