Chapter 295 cover
Chapter 296 profile
- Chapter 301.jpg
Chapter 301 cover; on left
Chapter 349 cover; under work by Aya Tsuji and Cinderella
Chapter 350 cover
- Chapter 351.jpg
Chapter 351 cover; under Cinderella's effects
Yukako Yamagishi (山岸 由花子, Yamagashi Yukako) is a supporting character in Diamond Is Unbreakable. She featured centrally in the Yukako Yamagishi Is in Love and the Yukako Yamagishi's Vision of Cinderella story arcs.
Besotted with Koichi Hirose, Yukako also appears as an ally among the group agreeing to watch for the killer terrorizing Morioh.
Yukako is a teenage girl of fine build, 167 cm (5'5¾") tall. She is characterised as especially beautiful (noted by Aya Tsuji[2]), with fine facial features and bodily proportions. She has full, dark, wavy waist-length hair; and dark eyes.
Like most characters in Part IV, she is only seen wearing a dark sailor fuku, a pair of leather shoes and socks, while displaying mature taste in casual clothing.
Yukako is a high school student. She is introduced in the midst of a date with Koichi Hirose[3], whom she quickly reveals to be her singular and obsessive love interest, which subject occupies the majority of her role in the story.
Aloof, she is cold toward people at best, and angry at them for being in the way of her love for Koichi. With the power of her Stand she is able to act aggressively on an intense possessiveness towards Koichi, becoming violent towards any who she feels would hurt her chances of captivating him. She takes an overtly psychopathic turn when she decides to kidnap and brainwash Koichi, before his triumphant escape. She even admits that when she likes something she becomes obsessed with it.
She has shown pride in her hair and became angered when it was turned white during her fight with Koichi, despite initially referring to herself as ugly to Koichi when she was waiting for him to respond to her confession. In fact initially she appeared demure shy and sweet around Koichi before quickly showing her temper and obsession. She also tends to live in her own world, which makes her dangerous. She also has the tendency for her left eye to twitch when she is stressed. On a side note she is shown to be a very good cook.
Later, during her trials by the mysterious beautician Aya Tsuji, she shows an integrity to her desire for Koichi, finally leading him to return her feelings.
In terms of archetype, Yukako may be described as yandere. Araki comments that her personality was designed in reaction to a prevalent moe perfectionism to female characters, and in the statement that someone of any gender should be capable of being frightening or losing their temper.[4]
Yukako's Stand is Love Deluxe, lending versatile, prehensile life to her long hair; enabling her to spontaneously extend it, grasp heavy objects securely, and strike, smother or infect human targets.
In response to false rumors muttered by Josuke and Okuyasu in order to put her off Koichi, she kidnaps him; attempting to indoctrinate him and "change him into a better person".
When Koichi resists, she soon threatens his life, forcing him to fight against her. During a tumultuous battle, Koichi heroically saves her life as she accidentally falls off a cliff.
Later in the story, Yukako is warned about Yoshikage Kira after Shigekiyo Yangu's death and advises everyone to be careful.
Yukako, still lovestruck, seemed to have learned from her mistake in trying to force Koichi. Unhappy about her unrequited love she made use of the services offered by Aya Tsuji's beauty-enhancing Cinderella Stand, which rendered her into a bewitchingly attractive woman in the eyes of Koichi - for a price and a certain time limit, during which she was to use a special lipstick in order to uphold the "magic", i.e. the Stand's power. The stand allowed Ser to grow closer to Koichi, who, after some trials and tribulations, warmed up to her and willingly became her boyfriend.
However, when she forgets to apply the magic lipstick, her face becomes deformed and she flies into a rage at Aya, who grants her a chance for her to return to her original appearance should she be able to pick her original eyes. Yukako has trouble picking the right one until Koichi arrives to her aid and decides that he will pick for her, but requesting that Aya take away his eyes should he make a mistake. Aya, unwilling to take the role of an antagonist, decides to give Yukako her original appearance back.
Yukako also makes an appearance in Janken Boy Is Coming while sitting at Cafe Deux Magots with Josuke and Okuyasu.
Yukako last appears to bid goodbye to Reimi Sugimoto.
(The information below derives from a Light Novel not written by Araki. As such, it may or may not be considered canon.)
Yukako was Chiho Futaba's neighbor when they were kids. She helps Koichi find Hanae Orikasa's killer, a student with red marks on his arms. Suspecting the killer might be in the same class as them, Yukako traps their class in the classroom so Koichi could rise the temperature with a word made by Echoes, making the students take of their jackets. Unfortunally, the killer wasn't in there.
Yukako makes her first video-game appearance in Eyes of Heaven as a playable character. She was confirmed alongside Koichi, who appears as her main tag-partner.
Her moveset primarily consists of melee attacks with her hair.
Her GHA has her wrap the opponent in her hair before flinging them around, slamming them into the ground three times before raising them extremely high up into the air before launching them into the ground one more time hard enough for them to bounce.
She is paired with Hol Horse in the Eyes of Heaven tournament, but was eliminated in the preliminaries by Jotaro Kujo and Vanilla Ice.
Chapter 295 cover
Chapter 296 profile
Chapter 301 cover; on left
Chapter 349 cover; under work by Aya Tsuji and Cinderella
Chapter 350 cover
Chapter 351 cover; under Cinderella's effects
Yukako stalking Koichi
Yukako, using Love Deluxe, attacks Koichi
Yukako using Love Deluxe on a old man's hand
Having her appearance changed by Cinderella
Yukako on the 4th Another Day cover
Yukako dancing in Crazy Noisy Bizarre Town.
Yukako Yamagishi's render in Eyes of Heaven (PS3/PS4)