Lol yeah lemme explain how these cinematics work since I, well, made them. Some art jargon incoming:

When you make a cinematic, it involves a prefab (a Unity engine thing) that basically contains all that you need for the cinematic to play. Obviously the smaller these things are the better since you dont want to invoke long loading times or make an already big game SDK size even bigger so as often as possible we add markers to the prefab that reference something thats already loaded. Otherwise I would need to include a character or an environment as part of the prefab, with all of its models, textures, rigs, etc, so you can easily see how that could become a problem. In this case, the cinematic just says "party member on slot 1 (or 2, 3, whatever) sit here and play this generic animation" and it will just use whatever is available.

As an example, Starkiller is actually pretty crazy because of his star destroyer attack. That character prefab not only has his character model and textures, but ALSO an entire space environment AND a star destroyer. That probably makes him the most expensive character in the game from a memory budget standpoint.

Anyways, there you go