Complex sentence: Hardly appearing in Andersen's original story, the sea witch is not a prominent character, and lacks a proper name, while in Clements original treatment, Ariel is the only character who is actually given a name.
Split into simpler sentences: Hardly appearing in Andersen's story, the sea witch is not a prominent character, and lacks a proper name. In Clements' original treatment, Ariel is the only character who is actually given a name.