Copyright 1997 The Chronicle Publishing Co. The San Francisco Chronicle JUNE 17, 1997, TUESDAY DAILY DATEBOOK; Pg. E3; LETTERS TO DATEBOOK HEADLINE: LETTERS TO DATEBOOK ... 'XENA' BENEFITS FROM GABRIELLE Editor -- I really enjoyed Laura Evenson's article (''TV's Warrior Princess Rules Over a Diverse Fan Base While Expanding Her Multimedia Empire,'' May 29) on ''Xena: Warrior Princess.'' It is my favorite TV show, which still surprises me. I did not start watching Xena until this year; I thought it was just a female version of ''Hercules'' or ''Baywatch.'' What makes ''Xena'' different from the usual campy action show is its quieter moments, usually between Xena and her sidekick, Gabrielle, which give the characters depth and make them, and the show, a bit more interesting. I was disappointed, however, that Renee O'Connor received only a passing mention as Gabrielle. Unfortunately, Renee's contribution to the success of the show is usually overlooked. Gabrielle is much more than the typical sidekick who is around to provide comic relief, to be rescued and to tell the heroine how wonderful she is. The friendship between Xena and Gabrielle is the heart of the show; ''Xena'' really is a buddy show. Without O'Connor's strong, mature performances and the great chemistry between her and Lucy Lawless, the show would not be the runaway hit it is. In all the articles I have read on ''Xena,'' the violence on the show is passed over with the usual arguments that it is comical and also acceptable in the context of the story, with the good guys/gals winning. Other people, such as Chuck Norris, have been criticized for using these arguments. Given that violent crime has dropped in this country for the fifth year in a row, maybe the tone and context of the violence in a show, whether it is a raised voice or a raised sword, are much more important in how people react to the violence than the anti-violence crusaders had thought. Maybe ''Xena's'' popularity will help take some of the emotion out of the TV violence debate and allow for a more reasoned examination of the issue. PAUL BINGENHEIMER Cupertino .... .