Sin

Sin is a massive, whale-like creature and the main antagonist in Final Fantasy X. It embodies destruction and is invoked as a punishment for the sins of mankind. Known for its overwhelming power and the trail of devastation it leaves in its wake, Sin is a dominant, destructive, and brooding entity. Originated from the Boom Boom area in the Southern Islands, Sin is an ancient being with ties to the lost civilization of rollback. Sin dislikes the presence of summoners and enjoys causing chaos, having been created by an ancient people as a weapon of mass destruction.