Achtung Baby

Achtung Baby (アクトン・ベイビー) is the Stand of Shizuka Joestar featured in Diamond Is Unbreakable.

Appearance
Achtung Baby is bound to Shizuka's own body, granting her the ability to turn invisible. Thus it doesn't have any appearance to speak of.

Abilities
In theory useful, Achtung Baby is in practice an inconvenience as the user is a vulnerable baby.

Invisibility: Achtung Baby has the power to render its user Shizuka invisible.

Shown to be linked to Shizuka's stress level, hinting at the ability being a defense mechanism, Achtung Baby enables her to become invisible, but in case of great distress, to render everything within a certain distance of her (be it a Joseph's hands holding her, her baby carriage or even the ground to become invisible). At its full power, it makes everything in a several foot-radius invisible.

The invisibility status may last on the affected subjects even when they have already been removed from Achtung Baby's ability range. As shown that the ground, trees and stones continued to stay invisible after the carriage which was carrying Shizuka had gone past them while her ability was active, leaving a trail of objects with visually voided portions.

Although everything under Achtung Baby's influence is invisible, they can still be detected if they emit a sound or an odor, as Joseph discovered when Shizuka defecated in his hand.

By default, Shizuka is always shown to be invisible when calm, but the range of her power increase if she's startled. Should her emotional state be recovered, objects that were turned invisible by the ability will return back to normal.

Gallery
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Trivia

 * Araki admitted the sole reason for creating the Stand was for Josuke and Joseph to have a bonding adventure.
 * The term "Achtung" is German and translates "Attention/Caution".