Complex sentence: In his endeavors, Ashe is assisted by Sarah (from the original film; portrayed by Mia Kirshner), who provides Ashe's facial make-up in honor of Eric, and helps him in his mission.
Split into simpler sentences: In his endeavors, Ashe is assisted by Sarah (from the original film; now portrayed by Mia Kirshner). Sarah provides Ashe's facial make-up in honor of Eric, and helps him in his mission.