Nicknames: Michel, Death Boss, Undie Boss, "Undie" [Ginko-only]
Birthdate: November 15, 1982
Zodiac Sign: Scorpio / Water Dog
Guardian Dragon: Luminous
Height/Weight: 185 cm (6'3") / 62 kg (136 lbs)
Bloodtype: O
Occupation: Junior at Kasugayama High School
Arcana: Death
Elemental Affinity: Water
Starting PERSONA: Rhadamanthus
Ultimate PERSONA: Hades
Weapons: Machinegun concealed in a guitar case
Appearance: Very tall and slim
Idle Animation: Narcissistically hugging himself and striking poses
Likes: Writing songs, singing, posing
Favorite Sports: None (he hates getting sweaty)
Favorite Subjects: Art
Family: Father (Kankichi Mishina, sushi chef at Gatten Sushi), Mother (she's plump like Eikichi once was)
Talents: Can tell when people are lying (except his dad apparently probably due to being afraid of him), portraiture
Favorite Foods: Melon, Salad (he's a vegetarian because meat would make him fat; he's on a perpetual diet)
Hated Foods: Sushi, fatty meat
Phobias: His father (just hearing his voice scares him), his mother (he's afraid he'll be fat like his mother), fish (hates the look of dead fish eyes, the smell...)
Dream: To have his "debut" as the lead singer of Gas Chamber and to become a rock star
Games: Main party character in Innocent Sin; NPC in Eternal Punishment
Theme: Luv Beam
Voice Actor: Kousuke Toriumi (JP), Troy Baker (EN)
HISTORY
When the three returned the next day, Alaya had been burnt to the ground, so they thought they had killed Big Sis and Tatsuya! Horrified, the three remaining children hid the five Masquerade masks in their hideout in Mt. Iwato and went their separate ways, forcing themselves to forget what had happened.
FUTURE
According to the lounge TV on 11/16 in Persona 3, Eikichi ends up training to take over the sushi shop. (A young man in his twenties with blue hair and a guitar case, whose birthday was the day prior.)TRIVIA
Eikichi lives in a sushi shop, but he hates sushi (his hatred of sushi is based on Kazuma Kaneko's hatred of sushi and all kinds of seafood.)
His school uniform is blue because Kaneko wanted a different color than the Sevens and Hermelin uniforms, so he picked the "color of spring" (blue) for KasuKou. ("Kasugayama" = "Spring Day Mountain")
He has an after-school job in a "live house" - a club with live music.
With his makeup off, he unfortunately looks just like his dad.
Eikichi's dad would throw a fit if he knew how Eikichi dressed, so everyday Eikichi sneaks out of his home, goes to a public restroom, dyes his hair blue, puts on his makeup and modifies his uniform, and then goes to school. On the way home, he reverses the process (although how can Kankichi not see his black nail polish?) and Kankichi is apparently oblivious to his son's daily transformations. (Eikichi's mom doesn't seem to mind; she's apparently the type who'd go, "My, my, isn't that nice!" and smile.)
EIKICHI MISHINA (三科栄吉)
Eikichi is the infamous "Death Boss" of Kasugayama High School, the boys' school for juvenile delinquents. He's called that partially due to his reputation as a badass, and partially because he assumed that had the unique ability to summon a reaper to help him fight. (His first summoning call is "Let's go, Shinigami!" instead of the usual "Persona.") He claims to protect the weak from bullying in Kasugayama, and is both feared and respected at both schools. However, he's also picked up the unfortunate nickname "Undie Boss", due to his habit of pantsing his defeated enemies.
The most distinctive thing about Eikichi, besides his narcissism, is his visual-kei style: pale, flamboyant, with a lot of makeup and rings and jewelry. (That thing Eikichi wears isn't a skirt, by the way - it's a long "tunic" under his uniform top.) With visual kei, the look and style is FULLY as important as the music. Basically, it's the least-traditional thing around...so Eikichi is stuck as the very modern son of a very traditional sushi chef.
Eikichi also uses a LOT of "Engrish" in the Japanese version of the game, because English is "cool". Unlike Ellie, who is presumably fluent and uses English words in roman letters, Eikichi's speech is peppered with random english phrases in katakana: "MAI SUIITO SUIITO HANII", "OKEI EBURIBADII", "MAI FURENZU", "BEIBII", and so on. In the English version of the game, he uses French for the same reason.
Eikichi is loud, brash, and emotional, in contrast to the quiet, reserved Tatsuya. Eikichi is always loudly declaring what he feels about a situation or a person. He's always fighting with Ginko because, really, they're more alike in personality than either would like to admit. Eikichi's narcissism isn't really because he thinks so highly of himself - he's actually very sensitive and has a very low self esteem, so he overcompensates with his "super-cool rock god Michel" act. He's trying to become the complete opposite of how he was when he was a little kid - fat, shy, and dorky - so he overreacts when anyone reminds him of how he was.
Eikichi, despite his tough reputation, is probably the nicest guy in Tsumi. He's incredibly devoted to his friends and will do anything to help them, and he blames himself if anything happens to them. For example, when Ginko is upset and depressed, he does his best to cheer her up and says he's there for her. In Tsumi, Sugimoto was a Boss Fight because he kidnapped Miyabi. But in Batsu, Eikichi breaks into a lab and risks his life to save Sugimoto, just because Eikichi is the school Boss and he feels that it's his duty to take care of all his classmates, even the annoying ones who want to kill him.

He has a band called Gas Chamber, whose logo he personally designed and wears around his left arm. The other band members are his childhood friends Shogo, Ken, and Takeshi, and they practice in Sumaru Prison after school. Eikichi's always ranting about how awful they sound, and Ken meekly reminds him that they haven't played instruments since they were kids - but Eikichi still thinks they'll have their big "debut" soon. (In Japan and other parts of Asia, indie bands have their "debut" at a "live house" - a club with live music. That's how you climb up the ranks to stardom, but there's this terminology specific to that part of the world.) He, of course, claims that his lyrics and vocals are good enough on their own to make the band famous.
RELATIONSHIPS
...with Miyabi Hanakouji In elementary school, a lot of kids made fun of Eikichi for being a fat, stuttering nerd who liked to draw comics. Pretty, popular Miyabi Hanakouji was his best friend, so the other kids got jealous of him and pulled down his pants in front of Miyabi. To add insult to injury, someone told him that Miyabi hated fat people. His ego was essentially squished into the sidewalk by this double-whammy, and he underwent a massive weight-loss/image makeover program. He became a vegetarian and worked out to lose the weight, and he started dressing like a visual rock star and kicking people's asses to erase the image of him as a chubby, shy loser. To get revenge on the people who embarrassed him in front of Miyabi, he'd pull down the pants of everyone he beat up.
But he didn't recognize Miyabi when he met her again; she was fat and went by the nickname "Hanaji" in Japanese (nosebleed - a pun on her name "Hanakouji" and a reference to the curious event when she got a nosebleed in the girls' locker room) or "Kozy" in English (again, a pun on "Hanakouji") and didn't tell him her real name. Even so, he kind of liked her, and wasn't at all upset to find out that she was really Miyabi, despite the teasing he got from Sugimoto. Miyabi, however, now felt unworthy of him.
...with Kankichi Mishina Eikichi's dad is a sushi chef at the Gatten Sushi. Eikichi is terrified by his very old-fashioned dad, especially because Kankichi pretends that he knows 18 forms of martial arts - "including capoeira!" Eikichi knows his dad won't like his visual kei interests, and knows that his dad wants him to take over the Gatten Sushi one day, so he lives in fear of his dad kicking his ass.
...with Lisa Silverman His most interesting relationship in the group is with Lisa. They are ALWAYS at each other's throats, insulting and yelling at each other. They even gave each other insulting pet names - Ginko calls him "Undie Boss" and he's the one who nicknamed her "Ginko" ("Gin" = "silver", as in her last name, and he knew she'd hate a Japanesenickname). But, despite their constant bitching and fighting, they're always the first to leap to each other's defense. Eikichi frets and worries when he knows Ginko's alone with a possible Masquerade Executive - Prince Taurus - and wants to run and rescue her, but Tatsuya stops him. Likewise, Ginko's the one who really wants to jump in and stop Sugimoto from beating Eikichi up, but, again, Tatsuya stops her. I really like them together; they bring out aspects of each other you wouldn't see normally. Without each other, Ginko would probably seem like an annoying Tatsuya-obsessed fangirl, and Eikichi would seem like an annoying egotistical poseur. So their relationship is really important in that sense; it fleshes out their characters.
...with Tatsuya Suou Eikichi basically views Tatsuya as his rival - they're both tall, skinny, good-looking guys. Tatsuya also can play the guitar! And Eikichi has a band! How convenient!
...with Jun Kurosu Apparently when Jun entered Kasugayama, rumors quickly spread about this scary transfer student who would seriously maim you if you picked a fight with him. Eikichi, as the self-appointed leader of the students, went to check out the new kid, decided that he was "harmless", and promised to "protect him". Hee!