Complex sentence: Anna is known for her rivalry with Nina, a trait that has been around since the original "Tekken" game, and she originally shared most of her moves with her sister, but has since gained a more unique moveset.
Split into simpler sentences: Anna is known for her rivalry with Nina, a trait that has been around since the original "Tekken" game. She originally shared most of her moves with her sister, but has since gained a more unique moveset.