Shizuka Joestar

Shizuka Joestar (静・ジョースター) is a minor character featured in Part IV: Diamond Is Unbreakable.

Shizuka is a baby found on the street in Morioh by Joseph Joestar, who subsequently adopts her.

Appearance
Shizuka is a female baby. Her face is made visible only once when covered by makeup, upon which Joseph and Josuke agree that she is cute.

She wears a range of soft, light baby clothing, including a small, bobbled knit cap, and large, dark glasses (designed to hide her invisible eyes).

Personality
Shizuka is a baby of average temperament.

Her Stand activates when she is startled, frightened, or distressed, rendering her invisible.

Abilities
Shizuka's Stand, Achtung Baby, renders her invisible; as well as everything inside a certain sphere around her, when particularly distressed.

Diamond is Unbreakable
For unexplained reasons Shizuka was a baby lost in Morioh, probably because her stand power Achtung Baby, which can turn herself and her close surroundings invisible, including the ground, turned her invisible to her parents.

Upon discovering her, Joseph Joestar and Josuke Higashikata are thrown into a wild chase to find her, during which Joseph proves his worthiness to Josuke by slitting his wrist so that his blood would be able to track her location. From then on Josuke saw his father as more than just any "old man" and instead recognized him as someone willing to place himself in danger for the sake of protecting an innocent life.

Shizuka helped Rohan Kishibe when he was attacked by Ken Oyanagi. To win the last rock-paper-scissors match, Rohan used his Heaven's Door in Shizuka to make her force Ken's hand to use rock, allowing him to win the match no matter what Ken decided to choose. She was held hostage by Ken, but Rohan convinced him to let her go in exchange of another rock-paper-scissors match.

For the rest the series, Shizuka remains mostly carried by Joseph, who had adopted her into his family despite risking the wrath of his wife Suzie Q suspecting her to be another illegitimate child of his. Her real parents were never found.

Trivia

 * Shizuka is one of the only three infant Stand-users, joined by Mannish Boy and The Green Baby.
 * Shizuka does not appear prominently after the Picked Up Something Bad! story arc. It is suggested that she lives peacefully with Joseph Joestar.