Bayonetta

1st phase: You are on a platform, which will be regularly destroyed, and your task is to destroy his arms first. You have to evade shots from his other hand and a devastating punch with his blue glowing fist, which can be evaded. Just attack him with your pistols if he is too far away to punch and keep mashing . Once you are on his arm, change to panther and run to inner side where a orange glowing beam ends. Destroy this bubble while dodging either blue projectiles or a discharge.

2nd phase: Same as 1st phase, but he can release these fog creatures from his mouth.

3rd phase: Finally, on the main body you have to destroy the remaining bubbles to drop the shield protecting his head. Once the shield is down be careful as he can fire shots from his eyes, spin the head while releasing a laser beam, grab you with a dark hand from its mouth and release fog creatures. Just dodge on a regular basis and keep pummeling the head until it is time for a new demon.