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
While theoretically useful, Achtung Baby is in practice an inconvenience as the user is a vulnerable baby that hasn't yet learned to control her power.

Invisibility
Achtung Baby has the power to render its user, Shizuka invisible. Its power is shown to be linked to Shizuka's stress level, hinting at the ability being a defense mechanism. In cases of great distress, it will also cause everything within a certain distance of her to become invisible, be it the hands of the person holding her, her baby carriage or even the ground. At its full power, the invisibility will expand to a several foot-radius.

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

The invisibility seems to last even when affected objects leave Achtung Baby's ability range, as shown when the carriage which was carrying Shizuka had left 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.

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 "Caution".
 * This stand, along with Ratt & Boy II Man are the only stands in the anime to lack eyecatches.