The character page for Humanity Has Declined.
The Mediator
Voiced by: Mai Nakahara
A sensible mediator between humankind and the fairies. She is one of the few humans left capable of creating sweets, which causes the fairies to naturally flock to her. Having observed the slow decline of humanity, her outlook on life is grim.
- Bad Liar: She's not that good at making excuses for the fairies' mischief. Y explicitly calls her out on this during their school days.
- Brilliant, but Lazy: She's highly intelligent and is a fully capable individual if she applied herself more often but prefers taking the easy way out since she dislikes exerting too much effort on everything.
- Chronic Hero Syndrome: Despite being overly pragmatic (and somewhat lazy), the Mediator will usually go out her way to help others. This was most prominently featured in episode 6, in which she sabotages the electric generator in order to prevent P-ko and O-taro from leaving the solar system.
- Defrosting the Ice Queen: Starts off as an aloof and distant individual during the beginning of her first year in school. She loosens up after making friends.
- Everyone Calls Him "Barkeep": Everyone refers to her as the Mediator.
- Fire-Forged Friends: Grows into this with Y, after the latter coughs up some interesting information on the individual members of the Wildrose Society...
- Jerk with a Heart of Gold: Beneath all that pessimism and apathy is a genuinely nice person.
- No Name Given: The ending credits list her as "Watashi".
- Prehensile Hair: A side effect of the Fairy Co. hair grow lotion.
- Sugar-and-Ice Personality: Aloof and standoffish (more so when she was younger) but a sweetheart when you get right down to it.
- Sweet Tooth: Possibly, seeing as how she bakes sweets as a hobby.
- "The Reason You Suck" Speech: She delivers a particular nasty one to Y when they were in school.
Assistant
Voiced by: Jun Fukuyama
A young boy in a Hawaiian shirt who almost never speaks and serves as the Mediator's assistant.
- Camera Fiend: He is rarely seen without a video camera.
- Everyone Calls Him "Barkeep": He's only known as the Assistant.
- The Silent Bob: The Mediator can hold conversations with him without him needing to talk.
- Token Human: The final volume reveals that the Assistant is the only real human left in the story, since Mediator and other humanoids are actually fairies. This would also make him, to the story's knowledge, the Last of His Kind.
Y
Voiced by: Miyuki Sawashiro
An old classmate of the Mediator whose job is to identify human artifacts.
- Shipping: Invoked and spoofed, she ships chess pieces!
Pion/Pioneer
Voiced by: Nana Mizuki
A humanoid robot with cat ears.
- Electronic Speech Impediment: Her voice distorts whenever she tries to remember her name.
- Everybody Knew Already: It becomes fairly obvious that Pion is not human as the story goes on, but she only reveals the fact towards the end of her story.
- Magic Skirt: Just how is she able to fight in a skirt like that...?
- Robot Girl: She's a robot that looks like a cute human girl with cat ears. Also doubles as a Cat Girl.
- Unfortunate Name: Which leads to the Mediator to give her the nickname of P-ko.
- Verbal Tic: Ends sentences with "de arimasu", further lending to her weird personality.
Oyage/Otaro Voyager
Voiced by: Nobuyuki Hiyama
A strange character, that appears in episode 6, and the target of the Pion's Mission, and is implied they are somehow related.
- Anthropomorphic Personification: Of the deep Space Probe Voyager
- Do Androids Dream?: Its revealed that the reason he returned to Earth is because he felt alone in the immensity of space.
- Everyone Calls Him "Barkeep": A odd example. As with Pion's name, its formed for some letters they remember of their real names being adapted into Japanese names ("O" and the suffix "-taro", that denotes a male name), but is revealed that his name is Voyager, just as the spacial Voyager Program, so overlaps with His Name Really Is "Barkeep".
- Mega Neko: Killer Death Cat, his ultimate form, somehow.
- Motor Mouth: Talking about the Behemoth Bulldozer he built.
- Scarf of Asskicking: Trademark alongside with Pion/Piko. Its that so that he even uses it when in the Big Brother Suit
- Shout-Out: He gets a Big Brother Suit out of nowhere in episode 6.
- Techno Babble: All of the specifications of the Behemoth are this, including a Old Wise Brain as a CPU and a Super Stellar Motor.