I believe that part in Chapter 13 is due to DID Games not locking Aden's slot. Interestingly, the game doesn't crash on me with Eileen or Kaie, but both will load Aden's graphic. What's actually happening is that every character has a Carry graphic which is a duplicate of Aden's graphic. I'm guessing maybe in some point in development that you could carry more than one captive (one for each party member) or that DID Games considered allowing you to change the party leader which is usually Seles (the game does allow changing the party starting in Chapter 13, but you can't change Seles' position).
If you swap Aden with Eileen or Kaie and defeat the two Crimson Scar women, the cutscene will show a duplicate Eileen or Kaie. This is due to how Didnapper 2 shows party members in cutscenes; when a cutscene triggers, the party members would pop out of Seles and then merge into Seles similar to Final Fantasy VII when the cutscene is finished.