- Nightmare Fuel: "Isabella" is, quite frankly, kind of terrifying, with a flat monotone voice and really dead eyes. It really says a lot of Clara's loneliness that she still clings to Isabella for as long as she does.
- Retroactive Recognition: Isabella is played by a very young Shay Astar, one of those actresses you've probably seen in all sorts of stuff—most notably, Ernest Scared Stupid, a recurring role on 3rd Rock from the Sun, and All Cheerleaders Die.
- The Woobie: Clara's dad keeps getting posted to new ships, and even she acknowledges how she never gets to make any friends as a result. And then Isabella screws things up for her when she tries to make friends with Alexander. Poor Clara.
YMMV / Star Trek: The Next Generation S5E22 "Imaginary Friend"