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Characters / Poison Berry in My Brain

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    The Outside World 

Ichiko Sakurai

Played by: Yoko Maki

The main character.

Saotome Ryouichi

Played by: Yuki Furukawa


Played by: Songha

    In Ichiko's Brain 

As a whole

  • Gender-Equal Ensemble: If you count the Mysterious Woman, then there are three women and three men in the committee.
  • Ghost in the Machine: Different aspects of what Ichiko thinks and feels.
  • Greek Chorus: They act like this to an extent.
  • Hive Mind: An interesting variant: though the mind members have their own thoughts and personalities, they all share Ichiko's likes and fears and act on those accordingly.
  • Royal "We": Inside Ichiko herself, they refer themselves as "we" and "us". However, Hatoko is the most likely to use "I" and "me".
  • Seeing Through Another's Eyes: Inside her brain, the council members can see what Ichiko sees.
  • Sharing a Body: The mind members in Ichiko's brain, though Hatako is the one who shares Ichiko's body the most; after all, she is the one who lives in the moment.


Played by: Hidetoshi Nishijima

The "Reason" aspect of Ichiko, and the leader in her brain.


Played by: Ryunosuke Kamiki

The "Optimism" aspect of Ichiko.


Played by: Yo Yoshida

The "Pessimism" aspect of Ichiko.


Played by: Hiyori Sakurada

The "Impulse" aspect of Ichiko.


Played by: Kazuyuki Asano

The "Memory" aspect of Ichiko.

  • And I Must Scream: Implied when, as everyone but Ishibashi contemplates suicide, Kishi says that "My only duty is that I only record memories. From the beginning, to the end".
  • Only Sane Man: He's the only one who never speaks into the mic. And (usually) the only who doesn't get into heated arguments.
  • The Stoic: Most of the time.
  • Younger Than They Look: Ichiko is 30, but he's represented as an elderly man.

    Mysterious Woman (Major spoilers!) 

Mysterious Woman

Played by: Yoko Maki

Represents Ichiko's sensualist emotions and impulsiveness. She easily overrules the committee.

WARNING: ALL spoilers are unmarked!

  • Contralto of Danger: Has a deep voice to signify just how deadly she can be to the other members.
  • A Darker Me: Is basically Ichiko without any inhibitions.
  • Determinator: "Where did you say that [Ichiko] has reached her maximum limits? When you say limits... The so-called outside 'the limits' is the exclusion of all things. It will soon reach its peak."
  • Forced Sleep: Her primary power.
  • Hell Is That Noise: The clacking of her heels signifies her presence in the movie.
  • Humanoid Abomination: She has never existed before in any of the meetings, has almost no facial expressions, can suddenly appear out of nowhere, and can knock the other members unconscious with special powers.
  • Light Is Not Good: She appears from a glowing doorway connected to a flight of invisible stairs, and her sleep powers are light-based in the movie.
  • No Name Given: We never learn her real name.
  • Nothing Is Scarier: Very little is known about her, not even In-Universe.
  • Not So Stoic: In the movie, her eyes show very visible concern as she strokes Yoshida's face when the latter tells her that they have to break up with Saotome.
  • Palette Swap: Very much resembles a darker-haired version of Ichiko herself in the manga.
  • Pre-Mortem One-Liner: "Sleep."
  • The Quiet One: Doesn't speak much at all by the ending.
  • Rule of Three: Appears in a grand total of three times in the film.
  • Significant Double Casting: She and Ichiko are both played by Yoko Maki in the movie, further symbolizing how the former is the latter's darker side.
  • Split-Personality Takeover: Will appear and hijack the meeting whenever Ichiko wants to have sex.
  • Stealth Hi/Bye: Can appear and disappear in a flash.
  • The Stoic: Never emotes.
  • Superpowered Evil Side: Downplayed, as she's only Chaotic Neutral, but the side of herself that Ichiko almost always keeps hidden away can easily take full control of her brain.
  • The Unfettered: Nothing will stand in her way to get what she wants, and will react harshly towards anything that does.
  • Walking Spoiler: Gives away the fact that she only appears and often hijacks the system whenever Ichiko reaches her absolute limit.

Alternative Title(s): Nounai Poison Berry


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