Saavik.
And the better of the two. She later said she did not play the second movie because she was offred a
lower wage than in the first movie.
But sorry, there is also her dark side. She was since her youth a Scientology member, bought her ranks up to some very high ranking inside that company ("operating thetan VII") and both spend millions on it and influenced others to spend on Scientology, again by the millions. Her Hollywood affiliates like John Travolta and Maria Presley also are/were. She refused to reprise an earlier series role that was embedded in the narrative context of a psychiatric setting.
Fool were she spend her own money on Scientology, dangerous where she made others to join Scientology.