Complex sentence: Sridhar persuaded Sachu that being a full-fledged comedy film, there were no separate comedians and she would only be playing a character in one of the three lead pairs; Gopu persuaded her grandmother, who used to accompany her to the sets.
Split into simpler sentences: Sridhar persuaded Sachu that being a full-fledged comedy film, there were no separate comedians and she would only be playing a character in one of the three lead pairs. Gopu also persuaded her grandmother, who used to accompany her to the sets.