The Nonsense User, a boy that drastically plays down his abilities, yet inevitably solves any mystery he encounters. Ii is an abnormal person. A "defective product." Unable to express much emotion, he is often seen with a neutral expression; however, Ii is able to express some emotion in some circumstances. At the beginning of his second year in junior high, he joined the ER3 System and went to Houston in America for 5 years and later returns to Japan at the age of 19. Upon return, he begins to attend Rokumeikan University in Kyoto. Ii is "friends" with [Tomo Kunagisa](https://anilist.co/character/29594/Kunagisa-Tomo), though he refuses to admit he has any and instead calls them acquaintances. Also known as the "mirror image" of [Hitoshiki Zerozaki](https://anilist.co/character/34293/Zerozaki-Hitoshiki), he is believed to be what Ii would be like if he didn't hold back. 

Tomo is helped out by Ii at times, having a friendly relationship overall. The two are similar, being unable to fully express emotions, though Tomo can only truly express happiness. Despite this, she and Ii had an incident a few years back that she never wishes to happen again. The incident is believed to be Ii leaving Tomo for 5 years. ~!After the beheadings occurred on Wet Crow's Feather Island, the culprit pointed a gun at Tomo, forcing Ii to admit his love for her, causing the culprit to give up as they were able to get Ii to say something he wouldn't.!~

As the mirror image of Hitoshiki Zerozaki, the two are unable to harm each other as they can both predict the other's moves. Their relationship is a strange one, as both of them are vastly different yet so similar to one another.

Many people call Ii some cutesy nickname like, "Ii-chan," and the like, though very few people know his actual name. 
~!In a conversation with Shiogi, Ii is asked questions to hint towards his name. After figuring it out, he requests that she not use his name, as anyone else has died. The people that have died being Tomo (emotionally), Magokoro Omokage (in a fire), and his forgotten younger sister Harukana Ii (in a plane crash)!~

It's the vacation of a lifetime, a trip to a remote island filled with geniuses–and murder. 
 
On Wet Crow's Feather Island, a tiny speck in the Sea of Japan, lives Akagami Iria, the exiled daughter of a powerful family. Born into great wealth, she was a princess of the highest pedigree–until she was cut off by the leader of the Akagami Foundation. For the last five years, she's lived on Feather Island with her maids. But she hasn't been alone. She has invited the best minds Japan has to offer to come and stay with her. 
 
And so nineteen-year-old college student Ii-chan and his best friend, computer genius Kunagisa Tomo, find themselves as Iria’s guests at her elaborate mansion. Surrounded by fascinating women – a chef, a fortune-teller, a scholar, and an artist, not to mention his own friend Tomo – Ii-chan is feeling a little overmatched intellectually. But the sudden discovery of a grisly murder sends the island into shock. And Ii-chan discovers that he does possess a bit of genius: the ability to discover what is real and what is fake, who is who they claim to be and who is a killer. 
 
(Source: Del Rey Manga)

[Profile](https://vims.co.jp/talent_profile_detail.php?id=7) | [Twitter](https://twitter.com/kaji__official) | [Instagram](https://www.instagram.com/yuki_kaji_official/) | [YouTube](https://www.youtube.com/channel/UCx2XAGS0FoG9S6r0bhNo2UA)

Kaji has won several awards, including Best Voice Actor at the 12th Tokyo Anime Awards (2013), Best Actor at the 7th Seiyu Awards (2013), and Best Voice Actor at the 36th Anime Grand Prix (2014). He married voice actress [Ayana Taketatsu](https://anilist.co/staff/101996/) in 2019.

__Non-Anime Roles:__ 
- [Ayerscarpe](https://anilist.co/character/300462/Ayerscarpe) - Arknights (VG)
- [Link](https://anilist.co/character/4201/Link) - Hyrule Warriors (VG)
- Ace - Final Fantasy Type-0 (VG)
- Hope Estheim - Final Fantasy XIII (VG)
- Bhunivelze - Lightning Returns: Final Fantasy XIII (VG)
- [Johnny Joestar](https://anilist.co/character/19492/Johnny-Joestar) - JoJo's Bizarre Adventure: All Star Battle (VG)
- Eight (VIII) - Super Smash Bros Ultimate (VG)
- Takumi - Fire Emblem (VG)
- White - Granblue Fantasy (VG)
- Flynn - Shin Megami Tensei IV (VG)
- Yuuichi Haga - Devil Summoner: Soul Hackers (VG)
- Zen - Persona Q: Shadow of Labyrinth (VG)
- Seth -  Under Night In-Birth (VG)
- Hyuuga Masamune - Touken Ranbu (VG)
- Luke Pearce - Tears Of Themis (VG)

A dropout from an elite Houston-based program for teens is on a visit to a private island. Its mistress, virtually marooned there, surrounds herself with geniuses, especially of the young and female kind—one of whom ends up headless one fine morning.
 
(Source: Kodansha USA)

Now that he’s a cool college student, our anti-hero Iichan thinks his crime-solving days are behind him. Cynical, sarcastic and minimally engaged in his studies, Iichan is much more interested in his own feelings of disaffection and isolation. But despite his resolve to remain aloof, he’s pulled into the narrative when he encounters and bonds with a serial killer named Hitoshi Zerozaki – a homicidal maniac with the soul of an artist whose talent is on display at the grisly scenes of his crimes.
 
(Source: Kodansha USA)

The No. 1 Killing Name, "Niounomiya", has finally arrived!
 
".....Specifically, what are you researching, Assistant Professor
Kigamine?" 
"——Researching not dying."
 
Invited to monitor the bizarre research on Kuchiha Madoka—a girl who lives eternal—Ii, the Nonsense User, visits the ruins of a clinic in northern Kyoto with antique apartment dwellers Ichihime Yukariki and Kasuga Kasugai.
 
However, what awaits them there is a terrible "fate" itself!
 
The Niounomiya siblings, the number one killers in the world, make their debut in this exciting new coming-of-age story.
 
(Source: Kodansha, translated) 
Note: Includes two extra chapters.

It may be true that where there is a beginning, there is an end, but it is too shortsighted to think that because there is an end, there must have been a beginning. In fact, the opposite is true. Most events have already ended even before they began, and they are closed even if they are not opened. I, a sincere and honest person who dares not speak truth as truth, dares not speak fact as fact, and knows the virtue of silence better than anyone else, will ascend a certain staircase in September. The Thirteenth Staircase. It was Kino-Raichi, Noise, Emoto Sonoki, Mio-tsukushi Takami, and Mio-tsukushi Misora. However, what awaits me at the top of the stairs is so ridiculous and so nostalgic… in this sixth installment of the "Zaregoto" series!
 
(Source: Kodansha, translated)

Tomo, Neon, Ii, Kyouichirou, Shito, Misachi, Kokoromi, Kasugai, Gaisuke, Jun, Kouta, Houko, Nanami
Dead Blue (Tomo Kunagisa) ——is desperate!
 
"You actually hate Tomo Kunagisa, don't you?" 
The genius engineer and former member of Tomo Kunagisa's Team, Gaisuke Utsurigi, is being held captive at a mysterious research facility—Kyouichirou Shadou (Mad Demon)'s Research Institute. Accompanied by her friend Ii—aka the Nonsense User, Iichan—are on their way to rescue Utsurigi, but are met with a horrifying "scene" that unfolds before their eyes. However, this "end" is only a taste of the "beginning" to come——!
 
(Source: Kodansha, translated)

An earnestly honest guy who doesn’t even grant pipe dreams to himself, physiologically incapable of letting a single contradiction go, in other words me, got dragged this June to a renowned academy for rich girls, no questions allowed, by the world’s strongest contractor. No matter how you put it, no matter how you spin it, there was probably no point to it. Because the case that arose there was, in and of itself, a bit of nonsense.
 
(Source: Kodansha USA)

The 10th instalment of the Zaregoto Series announced in the 20th-anniversary video for Nisio works. 
 
Kunagisa Jun is Ii-chan and Tomo's daughter, an "ordinary" 15-year-old attending Sumiyuri Academy. One day, Aikawa Jun kidnaps her and brings her to the Kunagisa Organization, where she happens upon a grisly murder. 
 
(Source: Amazon JP, translated)

Iori is a high school girl who doesn't know what she wants to do with her future, and tends to run away from things. One day, she is attacked by strange dead-eyed people on her way to school, only to be saved by an equally mysterious long-haired man. Later that day, her friend at school, Jion, seems to fall under the same murderous influence. To her surprise, she finds herself capable of defending herself from his violent attack. Afterward, the long-haired man she met in the morning, Zerozaki Soushiki, arrives once more, this time to invite her to become his little sister. What has Iori become involved with, and will she be able to survive this change to her life?


What if Monogatari's Ararararagi, Zaregoto's Ii and Jun "Humanity's Strongest" Aikawa, and Okitegami Kyouko no Bibouroku's titular forgetful detective all attended school together? In 2002, NisiOisiN won a Mephisto Prize prize for his debut novel Zaregoto, Book 1: The Kubikiri Cycle. Part of the 15th anniversary celebration will be 4-panel crossover gag manga Seishun Kijin-den! 240 Gakuen (240 is a pronunciation pun - 240 can be read as "Nishio," so "Youth Oddball Story! Nisio Academy"). 
 
(Source: Crunchyroll)

The Zerozaki Clan is a family of demonic killers, ranked third among the Killing Names.
 
A boy with eyes like that of a dead man and a serial killer with a tattoo on his face. The story of their encounter and the never-before-told truth of the Kyoto serial killer case is finally revealed! The motivation of Zerozaki Hitoshiki, and its miserable ending......?!
 
(Source: Kodansha, translated)