A nice, sweet yet repressed and self-criticizing artist/gamer geek who came to Japan because of what Largo did at E3. Out of money, he helped out some unknown girl in a train station and things just snowballed from there.
My Secret Pregnancy: Miho's Endgames character got his Endgames character pregnant, which is part of what led to their falling out. He hid it from her for years. Considering how she feels about fictional characters, it's going to be interesting to see her reaction.
Best Beer Ever It's been some time since we have seen him drinking, there is good reason for that.
Cloud Cuckoolander: Largo sees no difference between "in-game" or "real life". Pack of ravers? Zombies! Manhole covers? Spawn points.
Subverted, he may look like one for most times but there are moments when he is, in fact, very right about the situation: Extra-dimensional zombies are actually plotting invasion on Tokyo, and yes he really fights them while riding on a rentable Godzilla pastiche. He still can't seem to tell the difference between genuine zombies and ravers, though.
Chivalrous Pervert: In some earlier strips, we have seen that Largo is quite interested in Erika's r4ck, but when Erika later suggests stripping due to static-y fabric (see here) Largo says no, because "It would... distract me"
To clarify, it would distract Largo from the test session of Erika's newly assembled 1337-gaming computer.
He can also build a computer out of almost anything. The rush job ones are called "cereal box specials".
Leet Lingo: It's called 'English' at the school he "teaches" at
True Companions: Despite how much he and Piro disagree with each other at times, Largo has shown that he is willing to risky life and limb for his friend on a few occasions, once saying "If one of us is not secure, then neither of us is."
Kuudere & Tsundere: In many ways, she has been moving from being something of a Broken Bird to dithering between being both Kuudere & Tsundere depending on the day. She is neither completely cold and is too playful to be a permanent Kuudere (whom leans towards cynicism) while she tempers her rage more than most Tsundere (whom happens to also be a type A) characters. In either mood of the day, only Kimiko and (surprisingly) Largo can pull out full compassion or tears from her.
The Tease: If there is one character that is this, it's Erika. But only among the other megagamers (Kimiko is a frequent victim).
A young wannabe idol and Erika's roommate who, through a combination of luck, the internet, a feverishly-awaited game and a radio interview, garnered a legion of obsessive fans who would do anything for her. Something of a female counterpart to Piro.
A mysterious teenage goth girl who appears after Largo has one of his adventures. It eventually becomes clear that the weirdness around her is not due just to Largo's skewed perceptions. She's prone to fainting spells and suddenly disappearing, and, despite many scenes in cafes and restaurants, has only once been shown eating.
Manipulative Bastard: The Endgames incident, a major event in the backstory, involves Miho abusing the emotional systems of an MMORPG to turn the entire virtual world into her minions. Only Piro and Largo resisted her. She carries this trait into her real relationships, too.
Parental Abandonment: Miho lives in the basement of a goth nightclub. No mention of her family is made. After one fainting incident, the school nurse complains that she can never get in touch with Miho's parents, and says she needs their cell phone numbers. It's never mentioned again.
A prototype of the Emotional Doll System, a PS2 app that uses a Robot Girl for Dating Sim games, Ping was left with Piro and Largo by Tsubasa, her owner. As you might expect, she's somewhat naive, but has a good heart and is very enthusiastic.
I Want My Beloved to Be Happy. Programmed in; EDS units automatically break off any romantic relationships with their owners if they get a real girlfriend. Which means that, as Miho observed, "For her, every game she plays will end in a broken heart." (though Miho is something of a pessimist)
Yuki first met Piro while he was reading shoujo manga in a bookstore. After berating him, she discovered that he left without his sketchbook. After much drama, the sketchbook is returned. Then Miho and Ping turn up at her school, and her life takes a turn for the weirder.
Seraphim is a field agent for the Conscience Enforcement Authority and Piro's "conscience". She routinely appears to Piro as a small angel-winged woman perhaps six inches (15 cm) tall with (apparently) correspondingly reduced weight and ability to make virtually everyone overlook her presence.
Asmodeus is the only conscience entity introduced into the story so far who is not a member of the Conscience Enforcement Agency. He is apparently the evil side of Piro's conscience, although he seems to generally view his suggested deeds as "having fun", rather than "doing evil."
Boo is a hamster who is currently employed as a temp agent by the Conscience Enforcement Agency. He was assigned to help ease Seraphim's caseload after she complained about how severely overworked she was. Soon after, he was given a role as Largo's conscience, which has been his primary mission ever since.
Dom is an American who works for Sega's black ops division. When he hired in, the job opportunities were tight, with only one slot available for a new employee.
Cool Car: A sleek black company car. Miho casually destroyed it with one hand.
Corrupt Corporate Executive: Although he's generally a wet-works man, he's also been known to dabble in the paperwork side. Such as when he helped by the company producing the game Kimiko was working on.
Even Evil Has Standards: When he was competing with Ed over a job, he only locked him in his trunk so he missed his appointment.
Largo: What about all the other applicants?
Dom: Well...they weren't my friends, right?
The Sociopath: Has shown zero remorse for any of the things he's done.
Ed is a Sony Enforcement Division agent, Dom's best friend and rival. They both applied for a job with Sega Japan after graduation. Dom locked Ed in the trunk of his car so he would miss the job interview.
Highly-Visible Ninja: He does dress in black after meeting Largo for the second time, but still, he is seen by anyone (though not while doing ninja-y things...)
Subverted at one point in the comic where it says that the real Ninja Headquarters cannot be shown.
Hulk Speak: His speech patterns are based off old, poorly dubbed ninja movies, though that doesn't explain why he always refers to himself in the third person.
Some Japanese still refer to them selves in third person, but that is done mainly to show how childish that character is.
Honor Before Reason: At one point is willing to go up against a powerful magical girl in order to protect Largo. Keep in mind that Junpei considers the magical girls 'code of love' to be far more dangerous than the ninja 'code of honor'.
Lawful Neutral: Seems to take the 'personal laws' variation on this. He follows the ninja code of honor, but also does what he can to protect Largo.
Roof Hopping: Seems to be his main method of getting around. Comments at one point that this would be difficult to do while carrying Piro and Ping, as our resident robot-girl would be heavy, and some roofs on the way to their destination have a low load limit.
One of Yuki's classmates, and as of late her love interest. Evidently nursed a crush on her for many years which she has only recently become aware of.
The Chew Toy: He gets injured so often that even Dom feels sorry for him.
Everyone Can See It: Apparently Yuki was the 'only' person who wasn't aware of Kobayashi's affections towards her.
Reasonable Authority Figure: The highest-ranking official seen, and has the best interests of not only the entire city, but most of the cast, at heart. He even deputizes Largo when it looks like he'd be useful.