Hajime Tenga

bright yellow t-shirt with a logo of a black bear on the chest instead of a white collared shirt, along with sporting shiny red and white dress shoes, sticks out like a sore thumb.

His street style is equally loud and adventurous, but it is noticeably more practical. He is often seen donning tank tops or any shirt that shows off his muscles, along with accessories and, at times, loud flowery or geometric patterns paired with bright colors, typically worn with flip-flops for the summer. Overall, he seems to wear whatever he wishes to as long as it's comfortable, and doesn't seem to adhere to any particular style. His signature accessory is a white beaded bracelet with two pale yellow beads surrounding a larger blue bead in the center.

He is noticeably taller than most characters in the series, appearing to stand at around 185 cm (about 6 feet). He is seen as intimidating and scary by many due to his reputation, but is described in the novel as a "handsome young man" by Katsuhira Agata.undefined

Personality
Of the Seven Deadly Sins of Modern-Day Japan, Tenga's sin is that of the "Musclehead Thug." However, while he is known among his peers as an unpredictable and intimidating delinquent, his true personality holds a deep-seated desire to help others.

In the proper spirit of the "Musclehead," Tenga is an incredibly energetic and physically strong person who many times acts on a whim in order to push through and keep events moving along. In spite of his image, however, he in many situations can display some of the highest practical intelligence and observational skills among the seven kiznaivers, easily able to glean the root of a problem without much effort.

Although his nature is typically thoughtful and concerned for others, when he is faced with strong negative emotions such as jealousy, Tenga is capable of displaying liberal amounts of selfishness to the point of extreme senseless violence. Still, even in such rare cases, he eventually comes to terms deep down that his actions were misguided.

Tenga is shown to be quite the pervert, as exhibited when he attempts to fondle Nico Niiyama's "boobies" as she explains the concept of the Sleep Fairy, earning a big slap from her that everyone connected through the system is forced to endure. His nature is also suggested when he initially talks of "violating" Noriko Sonozaki every time she annoys him.

Self Introduction Arc
In the first episode, Tenga's first appearance is from within an outdoor bathroom stall, where he hears Katsuhira Agata being bullied by a couple of kids who have been harassing Katsuhira and taking his allowance money for years. He grins, presumably at his luck for stumbling upon the situation at the right time. Within moments, Tenga is shown helping Katsuhira out by scaring the bullies away (after demanding a 20% commission for the service). After successfully running the bullies off, Tenga hears that from Katsuhira's point of view, the bullies were not actually hurting Katsuhira, because the boy cannot actually feel pain. He decides to test out the validity of Katsuhira's claims, but misreads the meaning of Katsuhira's words and ends up accidentally choking him out.

Noriko Sonozaki then appears, taking the two of them with her to perform a mysterious experiment that she is involved in. After waking up following the surgery that connects his wounds with those of his classmates, Tenga is shown to be very confused about the experiment itself as well as its purpose initially, as are the other five present — Chidori Takashiro, Tsuguhito Yuta, Honoka Maki, Nico Niiyama, and Katsuhira — and he attempts to leave the area with Yuta, Honoka, Nico, and Chidori. However, they are all trapped again until they act according to Sonozaki's terms, which is to "introduce themselves" to one another. During this time, Tenga makes a sexual advance on Nico while she claims to be searching for the Sleep Fairy which causes her to slap him in the face, resulting in the first instance of shared pain among the kiznaivers. As their glowing wounds appear, both events appear to help them understand their situation a bit better.

During the following "Self Introduction" phase of the experiment, the newly formed kiznaivers are encouraged with high ramification to go beyond the basic first interaction, and instead share their deepest secret with each other — specifically, the one thing they absolutely don't want anyone to know. Sonozaki instructs each of them to look "deep within their chests" for an answer, which causes Tenga to remark that it's "cruel" to tell Chidori to look deep within her chest since it appears to be flatter than average, which causes Chidori to slap Tenga similar in manner to Nico's in the previous episode. After much argument, Tenga's secret ends up coming out first, as Noriko sends several large barking black dogs conveniently crashing through a window, breaking free of their leashes and muzzles.

Tenga shrieks in terror and makes a bolt through the door, tripping and hurting himself over a flight of stairs as he attempts to flee from the loose animals. When the dogs (and the kiznaivers) inevitably catch up with him, they see him jump onto a hospital bed and throw a chair at the dogs, shouting at the dogs to "stay back" and "don't get any closer." Despite the kiznaivers' attempts at calming him down, Tenga remains hysterical. Finally he collapses in a corner, crying and shaking, and begins mentioning in a dreadful voice before screaming through tears that he "really hates dogs!" Immediately after he exclaims this, an approving sound effect goes off, indicating that Tenga's deepest secret is that he has a phobia of dogs. He confirms that he dedicated a lot of time and effort to making sure no one found out about his fear, and Chidori and Nico attempt to support him while Tsuguhito Yuta chuckles into his hand.

Despite the obvious complexity and depth of his own secret, Tenga is later shown making fun of Yuta without shame in regards to Yuta's own secret, which was that the latter used to be a "fatty" before he entered high school.

After all of the kiznaivers reveal their respective secrets to the best of their abilities and are released back into the public, Tenga starts hanging out excessively in Katsuhira's apartment. After Tenga literally spends the night, Katsuhira finally comments on the fact that Tenga is spending a lot of time in his living room as Katsuhira cooks breakfast for the two. Tenga responds that living with Katsuhira seems like the "logical" course of action since Tenga swore to protect Katsuhira from the bullies, which is all the more imperative now that he feels everything that happens to Katsuhira. Katsuhira dryly remarks that there is no one more unfit to use the word logical, but doesn't put up any protest against Tenga's idea. Tenga casually asks to borrow Katsuhira's smartphone to play a mobile game, and then after he has it in his hand, he lectures Katsuhira about lending his phone to strangers, an action which, in Tenga's eyes, allows room for "bad guys" to do "bad stuff" with Katsuhira's personal phone.

Before long, Tenga discovers that Katsuhira and Chidori Takashiro are next-door neighbors. In excitement over the classic setup (of childhood friends as next-door neighbors), he tries to jump over from the ledge of Katsuhira's balcony onto Chidori's balcony — he fails however by a slim margin, slipping backwards and crashing into the bushes below. The pain of the fall is distributed equally among all of the kiznaivers, and Chidori and Tenga cry out in pain.

When the kiznaivers find out about the existence of a seventh kiznaiver from their class, who is in fact discovered to be a truant by the name of Yoshiharu Hisomu, Tenga is very enthusiastic in aiding in the search for him, believing that the seventh should join together with the group in order to become a team.

Summer Training Camp Arc
At the training camp, Tenga helps Chidori out by becoming something of her wingman when he ends up shedding light on the fact that she still has feelings for her childhood crush, Katsuhira. He roots for her throughout the entire first half of the episode, however his efforts to help give her a boost all prove to be fruitless.

When the Kizna Committee, made up of Noriko, Mutsumi Urushibara, and Kazunao Yamada, decides to announce their intention to put the kiznaivers through a "Test of Courage," Tenga is the first to notice that Chidori has disappeared just seconds before. By the time horror-themed Gomorins bust through the door with chainsaws, Tenga is quite worried for Chidori's safety due to what Chidori's sudden injury and Kazunao's words have implied, and he demands to know what has happened to her. He attempts to attack Yamada, but Yamada swiftly quells the altercation and Yuta suggests that instead of remaining in such a dangerous environment to focus on things which have already happened, the group should try to get out of the area and find where Chidori currently is, to which Tenga and the others agree.

As they fight off Gomorins while cornered in the fake graveyard, Tenga instructs a compliant Katsuhira to go and find Chidori "no matter what," still attempting to play the wingman even in the midst of such a crisis situation. Eventually however, after the kiznaivers discover what would later be exposed as the sharing of each others' emotional pain, Tenga along with the rest of the group is shown instinctively going to locate the source of the unpleasant feeling, which ends up being Chidori, who had been passionately lecturing one of the bullies, Kamaishi, who had been taking Katsuhira's money for so long. Tenga is shown giving Kamaishi an intimidating look before Katsuhira himself speaks to the bully.

Save Honoka Maki Arc
Tenga, Katsuhira, Chidori, Hisomu, Nico, and Honoka are shown hanging out in Katsuhira's living room after returning from the training camp. After reminiscing on the negative experience, Tenga complains that Yuta has been ignoring his text messages. As Chidori serves iced noodles, Honoka soon appears to become annoyed with the group and leaves. After she leaves, Tenga once again brings up Yuta's apparent lack of loyalty, however this time contrasting it with the pain he feels coming from Honoka's heart. Tenga comes to believe that Honoka's cold behavior to be caused by having had her heart broken by someone in the past. He concludes that in spite of the way she acts toward others (emotionally unavailable and rude), she always shows up to hang out with the kiznaivers without fail and actually craves companionship deep down.

Tenga openly and greatly despises Noriko, perhaps bearing the largest grudge out of all of the kiznaivers since