Characters: Jinrui wa Suitai Shimashita
- 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.
- 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 Her 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...
- First Person Snarker
- First-Person Smartass: She has her moments.
- I Just Want to Have Friends: Episode 11 focuses almost entirely on this.
- Nice Girl: 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 Smart Girl
- The Stoic: Very much so.
- "The Reason You Suck" Speech: Delivers a particular nasty one to Y when they were in school.
- Tsundere: During her school days.
- The Cynic
- I Just Want to Have Friends: During her younger years.
- Large Ham : When she's talking about her passion.
- Shipping: Invoked and spoofed, she ships chess pieces!
- Tsurime Eyes
- Yaoi Fangirl: Becomes her source of income.
- Cat Girl
- 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...?
- Scarf of Asskicking: And boy, does she ever.
- 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 VoyagerA strange character, that appears in episode 6, and the target of the Pion's Mission, and is implied they are somehow related. latter in the show is explained as he is the Anthropomorphic Personification of the Space probe Voyager, that has gained self awareness and desired return to earth, forcing Pion to seek for him
- Anthropomorphic Personification: Of the deep Space Probe Voyager
- Calling Your Attacks
- Do Androids Dream?: Its revealed that the reason he return to earth is because he felt alone in the immensity of the space.
- Gratuitous English
- 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.
- Moe Anthropomorphism
- 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.
- Spear Counterpart: To Pion.
- Techno Babble: all of the specifications of the Behemoth are this, including a Old Wise Brain as a CPU and a Super Stellar Motor.
- Tsurime Eyes
- You Gotta Have Cyan Hair