Can a fictional character that is out of copyright protection still have trademark protection? What uses of such a character are permitted or not permitted? Please provide a current real-world example.
Some notable examples of characters not subject to copyright in at least some jurisdictions but active trademarks are:
Note that the works these particular representations of those characters are taken from may still be subject to copyright: Thor the character has no copyright; Thor that looks like Chris Hemsworth with the gear Chris war in the Marvel movies is subject to copyright.