Hiyoko Tosaka
十坂 ひよこ
Real World
Debut: Hatoful Boyfriend
Theme: None
Character Voice: N/A
Heartful Stats
Birthday: Unknown
Gender: Female
Species: Human
Occupation: Student, cafe barista
Also known as

Hiyoko Tosaka (十坂 ひよこ) is the main character of the Hatoful franchise. She's the only human in St. Pigeonation's, due to a special arrangement with the school that is explained in the Hurtful Boyfriend route. Although she's a hunter-gatherer who lives in a cave and hunts for red meat for her breakfast, her favorite food is udon.

Early Life

Eight years before the events of the game, both of Hiyoko's parents were shot and killed in the Heartful House incident when they tried to act as mediators between the human radicals and birds. Their deaths signaled the end of negotiations and started an all-out fight between riot police and hostage takers in Hatoful House. Hiyoko and Ryouta, while witnessing the incident and the deaths of Hiyoko's parents, were approached by Shuu. Shuu asked if they had any desire, any wish to be granted. Ryouta wished for a world where humans and birds don't fight. Hiyoko then added the fatal line, "I would do anything to make Ryouta's wish come true."

Then and there, Shuu made his terrible promise to fulfill that wish someday, leading to the Hurtful Boyfriend route.

Hatoful Boyfriend

ED No.01-11:

Bad Boy’s Love (Hurtful Boyfriend)

Carve it into your soul, kid!
Spoilers for Bad Boys Love follow.

Hiyoko was killed at the start of the Hurtful Boyfriend route by the Charon Virus in Ryouta. The deadly virus, which affects only humans, was part of Shuu's plan to fulfill Ryouta's wish. With the human race gone, the fighting would stop. Shuu blackmailed Yuuya and together they cut her up into pieces.


Hiyoko as Labor 9[5][6]

Shuu proceeded to remove her brain and put it in Labor 9, a scarecrow-like being. Her last gasps to Ryouta before she died were eerily echoed by Labor 9 as, under the control of Shuu, it attempted to impede Ryouta and company from entering the sealed labs. It also kept every other normal student away from the main building as Ryouta and Sakuya investigated.

Labor 9 was a prototype of the Labor Model New Humans that was first developed by Dove Party researchers, but was condemned as unethical and was shut down. It was made to assist birds, and as a human brain controlling an artificial body, it was capable of completing tasks that birds would find difficult to do. Shuu had continued with the Dove Party's research and created Labor 9 to be his sidekick. Ryouta eventually used a taser to short out Labor 9 to get to Shuu.

Even in death, however, Hiyoko's spirit lived on. She appeared as a green floating flame to persuade Ryouta when he went into a brainwashed berserker state, and she accompanies his spirit as he lays frozen in cryogenic slumber as he awaits a cure for the Charon Virus.

Spoilers end here.

Holiday Star

The Christmas Thieves Attack!

Fallen Chronicles: Absolute Zero

The Day the Night Slept (Before)

The Day the Night Slept (After)

Hatoful Manga


Overload! Overflow! EX



Absolute Zero - the Forbidden Epic of Fallen Angels

Drama CDs

Hiyoko makes no appearance in any of the drama CDs to date.

Physical Description

Personality and Traits

She's really energetic and really dependant on her, "Hunter gathering instincts."


  • Her name, "Hiyoko," means "chick" in Japanese.
  • She's often depicted by the fandom as a girl wearing a fake yellow chick head or a rock pigeon head in a futile effort to blend herself in the school full of birds or as a normal girl with brown shoulder-length hair. Moa, Hatoful's creator, has said that Hiyoko's image is up to the fans' imagination.
  • She has a huge range of special attacks, some of which are powerful enough to break things.
  • Her childhood best friend, Ryouta Kawara, is in love with her, but she's too dense to figure it out.
  • After fighting the leader of a jackal tribe, she was welcomed into the pack as a brother.
  • She's 15 years old.
  • She enrolled in 2187.


Notes and References

  1. 1.0 1.1 1.2 Hatoful Boyfriend: A School of Hope and White Wings
  2. 2.0 2.1 2.2 Hatoful Boyfriend: Holiday Star
  3. 3.0 3.1 Webcomic
  4. 4.0 4.1 4.2 Absolute Zero - the Forbidden Epic of Fallen Angels


Hiyoko Tosaka


Anghel Higure · Kazuaki Nanaki · Nageki Fujishiro · Okosan · Ryouta Kawara

Sakuya Le Bel Shirogane · Shuu Iwamine · Yuuya Sakazaki


Albert Alain Alkan · Azami Koshiba · Hitori Uzune · Hoppe · Kanta · Kenzaburou Urushihara · Leone JB · Mino Ichijou · Miru & Kaku · Momo · Ousama · Pyonpyon · Rabu · Ryuuji Kawara · Tohri Nishikikouji

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