Complex sentence: Frollo is a good and kind character in the novel-until he is madly affected by his attraction for Esmeralda-but in the film he was portrayed as evil and tyrannical all the time.
Split into simpler sentences: Frollo is a good and kind character in the novel. At least until he is madly affected by his attraction for Esmeralda, but in the film he was portrayed as evil and tyrannical all the time.