Complex sentence: Whip's past is as shrouded in mystery as the young woman herself only remembers that she was looking for her brother (later revealed to be K'), and the only name in her mind was NESTS, so that is where she heads to.
Split into simpler sentences: Whip's past is as shrouded in mystery as the young woman herself. She only remembers that she was looking for her brother (later revealed to be K'), and the only name in her mind was NESTS, so that is where she heads to.