screen, the novelization establishes that  Saavik was half Vulcan and half Romulan. A scene cut from the  previous film, _Star Trek: The Wrath of Khan (1982)_ (qv), also  established this but can not be considered canon.  Leonard Nimoy (qv) seemed to have directed Robin Curtis (I) (qv)  to portray Saavik as a full Vulcan.