Mukuro

Mukuro is a doll-type monster that is met in the Collaboration Scenario, where she acts as an enemy and a boss in chapter 6. She comes from Shrift with Lampas, Kazuya and Daji.

Biography
She's first seen in chapter 6 by a suprised Kazuya, as several Mukuro dolls are attacking the villagers. When they don't recognize him, he understands that they're just machines. He then explains to Hakunen that Muruko was a girl who died in loneliness and whose spirit possessed a doll to make contracts with her partners by squeezing them, although these ones seem different and were apparently mass-produced.

It is revealed they were mass-produced by Kagetsumugi thanks to schematics given from someone. The small puppeteer then unleashes one that recognizes Kazuya. Kazuya then calls her by her old name, Akane, which triggers her old memories and forces the party into a fight.

When they beat her, Mukuro regains control of herself and joins the party. She acknowledges that while Kazuya likely knows another Mukuro, she's glad to be with him.

Several other dolls are fought in the Château des Romances.

Monsterpedia entry
"A being who arrived from another world. Further Details are unknown."

Attacks

 * Attack – One Foe
 * Cursed Hair: Flow – One Foe, Pleasure Attribute
 * Flamethrower – All Foes, Fire Attribute, Burn (25%)
 * Mechanical Hand Job (M) – One Foe (M), Pleasure Attribute
 * Mechanical Hand Job (F) – One Foe (F), Pleasure Attribute
 * Mechanical Fellatio – One Foe (M), Pleasure Attribute
 * Breast Doll's Gimmick (M) – One Foe (M), Pleasure Attribute
 * Breast Doll's Gimmick (F) – One Foe (F), Pleasure Attribute
 * Self Destruct – All Foes, Auto Hit, Ignore Defense, 100% Current HP Cost (Random Encounter only)
 * Time Stop – Self Buff, 3 turns, Time Stop (Boss only)

Strategy
As a doll, she's resistant to most status ailment, except for the ones related to shock effects. Raw shock damages is the way to go. Using song of defense to limit her damage output can be useful, as she possesses a powerful auto-hit attack as well as a painful self-destruct skill.

Her boss version is slightly tougher overall with immunities to status effects. She also possesses Time Stop which will freeze your whole party while she remains free to act. Save for that gimmick, she's barely stronger than Myusca and you should be quite better-equipped. In any case, make sure your team is always well healed.