Zero in - Main Characters

Main Characters

Kou Shiraishi

Kou Shiraishi is an average 16- (17 about halfway through) year-old high school student from a family of police officers. Because of feelings of inferiority with regards to his older brother, Gaku, his mild personality made him a prime target for the school bullies. He joins Minkei after the school idol Mikuru, who's also a part of the force, rescues him twice.

The training he receives builds an inner core of confidence and his exceptional performance in assessing tactical situations gets him assigned as a Keeper.His general friendly personality endears him to many at Minkei, and even the usually brusque Misono develops a degree of fondness for the younger man. He also passively pursues his relationship with Mikuru alternately confused by her bouts of jealousy, to irritated by her secretive nature about her past. As of volume 12, they've shared their first kiss after Kou began to actively pursue her.

Gaku Shiraishi

The eldest son of the Shiraishi family, and the youngest police commissioner at 28 years of age. He rarely ever shows his face at home, even avoiding the celebration of his father's thirty years on the police force. Kou deeply resents Gaku's aloofness referring to him as "that guy" to Ayuna's distress. He is currently under pressure due to the discovery of teenagers within Minkei and appears to have been creating a rival task force.

He is last seen talking to Shikie, ostensibly for the purpose of recruiting her, or having her keep tabs on Kou.

Ayuna Shiraishi

The 15- (16 about halfway through year-old sister of Kou who is a genius at cooking and displays her happiness and affection for her brother by karate-chopping his head. During their childhood, Kou would regularly protect her from bullies, resulting in constant cuts and bruises. Because of this, she possesses a tame brother complex. She is also developing rapidly, outgrowing her bras.

She is very popular and gets along well with Mikuru and referred to Kina as "sensei" when she realised Kina's cooking was even better than her own. She was devastated at her loss.

Ayuna later was targeted by the same man that killed Kina in another attempt to bring "life" to his dolls. Though Kou failed to rescue her, he left his phone on, taping the conversation and allowing Mikuru to hear where they were being taken. Shikie followed his phone's GPS, which was now in Mikuru's hands, leading to a brief scuffle before they joined forces (in a manner of speaking) to deal with the kidnapper. She fully supports her brothers pursuit of Mikuru.

Mikuru Nazume

A 16-year-old (later 17) high school girl. A product of childhood tragedy, Mikuru possesses several distinct personalities. The face of the school idol, friendly yet aloof And her true personality of an angry and bitter young woman. The third, and seldom seen, killer personality which only rears its head under extreme emotional distress. Forced to kill her father, whom she adored, she became withdrawn and introverted.

Trained from a young age to fight and shoot, she is adept user of the Zero In martial arts style, which she uses to incapacitate criminals. Unwilling to kill, she nonetheless is highly regarded and surprisingly well-liked within Minkei. Softened by Kou's attraction and friendship, she finds herself slowly drawn into a small circle of friends at school, which she finds herself beginning to enjoy, rather than it just being a cover. Less enjoyable, however, were the feelings of jealousy towards any woman that showed an interest in Kou who's newfound confidence was drawing attention.

As of volume 12, Kou has made his intentions towards her clear and they share their first kiss.

Kina Monjou

An 18-year-old member of Minkei, she was partnered with Kou during the training program a few times. She had an attraction to him due to a habit they shared. Her grandfather was part of the yakuza and was killed along with everyone else in the household by the hitman, Black Dogg. She was hidden at the time and despises yakuza and hitmen. In combat she uses either guns, or a special sword that she is skilled enough with to cut a car in half. Along with Kou and Mikuru, they finally captured Black Dogg, but she was shot in the stomach and spent some time in the hospital. Afterward she retired from Minkei and was planning to go back to her family's home, but while wearing only normal clothing and not carrying any weapons, she was shot and killed by her stalker, who made it look like a mugging, in order to bring his dolls to "life". Ironically, one of Kina's favorite saying is "I'm immortal".

Her hobbies were cooking and she was on-par with Kou's sister. She gave Kou her treasure after hearing that he loves Mikuru.

Shikie Misono

An elite officer from the Police Force brought in ostensibly to be Mikuru's partner. Sparks however flew from the onset as Shikie relishes killing criminals as opposed to Mikuru's reluctance. Since losing her first partner to gangsters Shikie has little patience for protocol and has several bounties on her head. She immediately dismisses Mikuru and Kou as kids playing at being cops and the situation finally explodes into a savage brawl that leaves both women battered and unconscious.

Temporarily assigned to Kou, she finds herself drawn to the younger man's earnestness and gives him his first kiss. Now permanently assigned to Hana Tomozou, she and Mikuru have made a degree of peace which is merely the swapping of the festering hate to a rather intense and very physical rivalry.

Hana Tomozou

Fresh from the Minkei training academy, he is in the team two months after Kina's death. He likes to refer to himself as "Ross" and gives nicknames to others. He seems to be trigger happy but doesn't kill. He usually paired up with Shikie Misono and calls her "Russian".

While not in Mikuru and Shikie's league, he is still surprisingly capable as an officer and also a skilled ping pong player, being a national champion while in high school. He attempts to use this to gain respect from the two women, only to be knocked out by Mikuru so that she and Shikie could go against each other. He attempts to impart his wisdom on the feminine mind to Kou, having taken an interest in Kou and Mikuru's relationship informing him that her constant jealousy is a positive indicator. Despite this his own romance life is pretty much nonexistent.

Fujita Nanami

13th division leader of Minkei, age 33. She's married and has a child. She's the most trusted member of the 13th division and is referred to as "Leader". Her true strength is currently unknown since while she has long been able to cow Mikuru and even Shikie is loath to antagonise her, she has also been seen to be intimidated while witnessing Mikuru training. During the strip ping pong match, she somehow defeated both Mikuru and Shikie brutally, claiming Kou as her prize.

Loyal to those under her, she is usually capable of reading her subordinates. Initially pairing Mikuru with Shikie as the most effective team, she quickly changed the assignments after she realised that her plan for them to rage themselves out was a failure. Stating they're like cat and dog, she goes as far as to wish Kou luck whenever he attempts to break up their scuffles.

This is a direct contradiction of her home life, as she is depicted to be very relaxed and a slob at home.