Bayonetta

1st phase: She attacks with the thorny "arms" and the little head in front of you. In my opinion a really easy boss as the attacks are quite predictable. Be careful if she retracts the small head and the eyes glow. At this time you can expect a rush attack which you should dodge. After you've done enough damage you can run along the "neck" dodging the arms and some white barriers to attack the core of the neck. After this part is dead, the arms will destroy the platform. Just jump off and fall down, evade with + to avoid damage and you are back in business.

2nd phase: Same as phase 1 but you have to destroy a rock once she's lost enough health, before you can run along the neck.

3rd phase: Again the same, but this time with two rocks instead of one.