*Madama Butterfly, also known as Mistress of Atrocity, is Bayonetta's contracted Infernal Demon and the source of most of her power. Known for her brutality as well as her beauty, she is initially unseen, with only her limbs manifesting as Wicked Weaves for Bayonetta to use in combat.

In Bayonetta 2, she is able to be fully summoned during Umbran Climax and certain cutscenes. She returns in Bayonetta 3 with a redesigned appearance, and acts as a conduit for both Demon Masquerade and Demon Slave.

She also has a more powerful form called Queen Butterfly, Lady of Onyx Brilliance.

A demon taking the form of a woman who left this world under unfortunate circumstances, only to be reincarnated in hell. Unlike her beautiful, swallowtail butterfly-like appearance, this demon is particularly brutal, and her reputation is well known even amongst the denizens of Inferno. If a conjurer were to sign a contract and trade her soul, the demon would impart upon her enormous power and great wisdom.

Madama Butterfly takes the form of a beautiful woman with a swallowtail butterfly theme. In the original two entries in the series, she wears a purple dress that splits from the middle up to her thighs, showing off her long legs, spiked purple high heels with butterfly accessories on them, sharp shoulder pads, and purple straps around her breasts. On her arms, she wears ridged purple braces with a strap that wraps around her middle fingers, butterfly accessories on her each of her hands, and red spikes on her knuckles.

Madama Butterfly's most defining feature is the large butterfly-shaped headpiece that sits evenly on her head, along with gold ornaments that rest on her forehead. Her eyes are completely red and appear almost jewel-like. In a physical form.

As indicated by her title in Inferno as "Mistress of Atrocity", Madama Butterfly is shown to take great joy in fighting and inflicting pain upon Bayonetta's enemies. She is seen smiling both sadistically and enthusiastically as she savagely punches, pierces, or claws at any foes*