Kyūsaku Yumeno

Kyūsaku Yumeno (夢野 久作,) is a member of the Port Mafia. Their ability is Dogra Magra.

Appearance
Q's hair is two-toned, the left side white and the right side black. Their eyes have different shaped pupils, with the right being a yellow star, and the left a yellow ring. Q wears a small hat tilted to the left, a white shirt and suspenders with a black coat and scarf around their neck, beige shorts with thin red stripes, brown shoes with high white socks that reach their calves, and a red sling bag with what appears to be a cat or dog design.

They always carry their doll, vital to their ability.

Personality
Although a child, Q has a twisted, sadistic personality, and revels in the carnage Dogra Magra creates. While they can play the part of a harmless, innocent child, they are quick to 180 into their darkest nature. Their sadistic personality leading to their confinement due to Dazai.

After the Guild abducts them, Q is made to suffer extreme physical and emotional trauma while ensnared in John Steinbeck's ability, which, spread throughout Yokohama, forces them to feel every instance of pain that the trees "feel". The pain overwhelms Q, to the point they snap and curse the entire city. Their breakdown drives them to question God's love for everyone and reveals their own intense hatred for humanity, themself, and their ability, which they never asked for.

Ability
Their ability, Dogra Magra (ドグラ・マグラ,), is a mind control curse that curses his targets or 'receivers' by ravaging their consciousness with hallucinations, causing them to attack everyone in sight with no regard on whom they might be; allies or foes, friends or enemies. The 'receivers' are those that "hurt Q", by bumping into Q and causing the razor blades taped to their arms to cut into them. This curse is triggered by mutilating a doll that they carry, which is the source. A blotch in the shape of a hand print appears on the body of the cursed individual. After the doll is mutilated, it apparently regenerates. Thus far, the only way to stop Q's curse is with No Longer Human.

Background
Q joined the Port Mafia shortly after Osamu Dazai, who is tasked with finding out the child's ability. It's implied Ōgai Mori kept them under his watch. Due to an unknown incident that led to a massive amount of mafia casualties, Dazai had Q locked away.

Appearances
{{Appearance
 * Chapters =

The Guild Arc

 * Chapter 24 - The Grapes of Wrath Ripen in His Eyes, Part 2
 * Chapter 25 - Q
 * Chapter 27 - Upon the Shattering Shores
 * Chapter 28 - The Emergancy Plan
 * Chapter 30 - The Silent Tower and the Raven's Feast (cover)
 * Chapter 31 - The Twin Darkness
 * Episodes=

The Guild Arc

 * Episode 19 - Will of Tycoon
 * Episode 20 - Though the Mind May Be Wrong
 * Episode 21 - Double Black

Fifteen Arc
}}
 * Episode 28 - Only a Diamond Can Polish a Diamond

Etymology

 * Their name Kyūsaku means "old story" (久) (kyū) and "build" (作) (saku)
 * Their surname Yumeno means "dream" (夢) (yume) and "field" (野) (no)
 * Their name when read in the traditional Japanese way of surname first (Yumeno Kyūsaku) means "A person who always dreams" in the.

Trivia

 * The birthname of the real life is Naoki Sugiyama (杉山 直樹).
 * The of the real life Kyūsaku Yumeno is Goshin-in Gin'en Taidō-koji (悟真院吟園泰道居士).
 * The real life Kyūsaku got his pen name when his father read a story he wrote for a contest. After reading the story, his father described his writing as "something written by a Yumeno Kyūsaku-san".
 * Q's demented nature, the hallucinations their ability causes, and their dislike of hospitals all stem from the novel Dogra Magra, featuring an amnesiac psychiatric patient that endures surreal, horrific experiences and experiments in an asylum.
 * In the same way that Edgar Allan Poe inspired Ranpo Edogawa in real life, H. P. Lovecraft inspired Kyūsaku Yumeno in real life.
 * Q's gender is not specified in canon.