one thing that really gets me in rotj is when luke is first captured, right as he’s calmly insisting that vader still has good in him, vader (standing behind him) ignites his lightsaber and you see this flicker of fear on luke’s face, then acceptance. i think luke went into this situation knowing conceptually that he would probably die, but this is the moment where the reality of that sets in, and he really has to accept the possibility that his father might destroy him and decide again whether he trusts him not to