Complex sentence: She boasted a proud and rebellious personality, though this was just a farce to conceal her huge crush for Ryoki, which was never reciprocated though-on one of their encounters, he even mistook her for her dead sister Akito.
Split into simpler sentences: She boasted a proud and rebellious personality, though this was just a farce to conceal her huge crush for Ryoki, which was never reciprocated. On one of their encounters, he even mistook her for her dead sister Akito.