Tasuku Kurosaki

Tasuku Kurosaki is the main male protagonist from the Dengeki Daisy manga.

Tasuku  is the 24-year-old school custodian at Teru Kurebayashi's school, who forces her to become his "slave" after she accidentally breaks a school window. It is also later revealed that he is DAISY, the anonymous person who's been sending her emails through a phone that Soichiro Kurebayashi (Teru's older brother) gave Teru before he died.

Appearance
Kurosaki is a tall, young man with blond hair, blue eyes, and a light skin tone. Teru Kurebayashi's friends describe him as attractive; as a result, he is popular among female students though he dislikes the attention and only cares about Teru's opinion. Riko Onizukacomments that when he was younger, Kurosaki resembled a "bishounen," which Teru finds difficult to believe given how rough looking he looks in the present. He often scowls and is effortlessly capable of intimidating most people.

Kurosaki's most distinctive trait is his blond hair. Some speculate that he dyes his hair, though he tells an inquiring teacher at Teru's school that it's natural while providing a slightly unlandish explanation. When Teru comments about why he bothers dyeing his hair as it makes him look like hoodlum, Kurosaki noncommittally remarks that is more troublesome not to dye it. Contradictorily, flashbacks to Kurosaki's childhood seem to imply that Kurosaki naturally has light hair. His hair becomes the subject of discrimination when a school teacher (Egawa) said that it made him look like a delinquent and that he should change it because he was now an adult.

Personality
Kurosaki is a sarcastic young man who doesn't generally display his emotions. He is often jokingly described as a pervert and a "lolicon" by his friends, as it is established among his closer companions that he has strong romantic feelings for Teru Kurebayashi.

He becomes protective of Teru whenever something questionable happens, and occasionally loses control, such as when he suddenly embraces Teru after he had a nightmare about Soichiro Kurebayashi (Teru's older brother) or when Teru is "kidnapped" by Masumi Takeda when they were shopping for cheesecake. Despite his strong feelings for her, Kurosaki believes that he has no right to love Teru as he is "the one that led her brother to his death." Throughout the manga he struggles between his feelings towards her and his own conflicting memories regarding his complicated past as a hacker. As DAISY, he's described as gentle and kind.

People usually comment that he's like a stereotypical tsundere, which is a Japanese character development process that describes a person who is initially cold and even hostile towards another person before gradually showing their warm side over time.

He is also shown throughout the manga to have a strong fear of horror, becoming frightened of scary movies and houses and easily getting scared in an abandoned building where a talking robotic anatomical model that Teru's brother built scared him.

Kurosaki is a somewhat picky eater, stating that he doesn't like things too spicy or too sour and prefers his curry sweet or mild spicy. He also doesn't like tomatoes or carrots, but likes potato salad, especially with ham and corn but not mandarin or apples. Kurosaki is a heavy smoker (his favorite brand of cigarettes is Phillip Morris) and drinker. He also seems to like to play mahjong online and make bets, and tends to hum when he is deep in thought.

Abilities
Kurosaki is seen as a skilled hacker, who has the abilities to crack into school databases, delete information, hack into Teru Kurebayashi's phone, amongst other things. His abilities are notably high-level and most appears to be self-taught, given his lack of formal structured education from not completing secondary school. He is skilled enough as a computer programmer to serve as a work-ready computer engineer and previously worked alongside programmers including Soichiro Kurebayashi, Riko Onizuka and Kazumasa Andou for three years and Kurosaki is also the creator of Jack o'Frost, a computer virus.

Kurosaki's other skills include speaking proficient English, operating machinery such as chainsaws and lawn-mowers, cooking, and other miscellaneous skills required for a custodial worker. He is also primarily left-handed, though he is capable of using his right hand for tasks such as eating and writing when necessary. Having lived with Master Masuda for several years and working at Flower Garden, Kurosaki is a good cook, though he does not own cooking utensils as he considers cooking for himself bothersome. It is also believed that he has poor eyesight, as he occasionally wears glasses, but doesn't normally wear them in public because they don't fit his image.

Trivia

 * The name Tasuku means "vane," "wing".
 * Tasuku's surname Kurosaki means "black" (kuro) and "promontory" (saki).
 * Kurosaki's birthday is on February 5th and his zodiac sign is Aquarius.