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Kenichi Yoshii


09 PTS

09 Anime

Kanji 吉井 健一
Romaji Yoshii Ken'ichi
Alias 09 (Zero Nine (ゼロキュー Zero Kyū?))
Biological Information
Species Human
Gender Male
Age 16
17 (from Line 54)
Height 161 cm / 5'3" (age 16)
Hair Color Beige
Eye Color Light Green
Date of Birth April 2nd, 1997
Unique Features Glasses
Biographical Information
Status Alive
Relationship Status Single
  • Unnamed Parents
  • Unnamed Uncle
  • Unnamed Aunt
  • Unnamed Cousin
Former Affiliation CCC
  • Developer
  • Engineer
Manga Debut Line 6; Monster
Anime Debut Episode 6; Dogmatic
Japanese VA Shouta Aoi
English VA Nathan Wilson

Image Gallery v   e

Kenichi Yoshii (吉井 健一 Yoshii Ken'ichi?) was a member of the CCC in which he acted under the codename 09 (Zero Nine (ゼロキュー Zero Kyū?)). Unlike Zero Seven, he worked in the background developing technologies they could use in the field.

During Plan B (The Ikebukuro Incident), he learned that there was an inside plan to have Nanako eliminated, so he left the CCC with her in order to protect her.

Appearance Edit

Kenichi is a teenage boy below average height and build for his age. He has short ear-length, beige-colored hair, the style of which, resembles that of a bowl cut. His bangs cover his forehead and frame his face, and he wears rectangular glasses which he wears over his light-green colored eyes.

After the timeskip, he seems to have developed a more mature face, along with a taller and slightly more muscular build; to the point where he is now taller than Nanako, the latter being 168 cm. He also grew his hair out to about shoulder-length and his bangs grew longer as well, framing his face more than before.

Gallery Edit

Kenichi's post-timeskip appearance, without his glasses.
Kenichi's full appearance in the anime.

Personality Edit

Relationships Edit

Nanako Tenjo Edit

Kenichi has a genuine crush on Zero Seven, but he initially didn't have the courage to straightforwardly approach her and would often secretly take pictures of her sleeping and collect them. However, he later decided to put his unhealthy habit of taking pictures of her behind, and become her real friend and to always be by her side.

Trivia Edit

  • He is the youngest member of the CCC, initially being only 16 years old.
  • Kenichi developed the thermography scope Zero Seven used, as well as a GPS tracking system used to track CCC members.


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Characters of the Devils Line Series
Main Cast
Yuuki AnzaiTsukasa TairaJohannes KleemanAkio KanoJuliana LloydTakashi SawazakiToshiro SakakiRyusei Yanagi

Keio University
Teachers Keiji Ochiai
Students Miwako TodaShouta AkimuraTsukasa Taira
MPD Public Safety
F Squad Juliana LloydMegumi IshimaruRyusei YanagiTakashi SawazakiYousuke AsamiYuuki Anzai
A Squad Kirio KikuharaYoshiyuki Uno
B Squad Takeshi Makimura
C Squad Masakazu TakimotoNaoya UshioYuu Kagasaki
Others Aya ShinjoKaname Yukimori Kenichi Morisawa Shizuka MahcidaTadaya Hiruta

Active Members Kaname ShiraseKirio KikuharaNaoya UshioAkihito KanzakiYuriko Hyuga
Former members Kenichi YoshiiKouhei Nakamura Mayu SumimoriMegumi IshimaruNanako TenjoRen Murakami Takeshi Makimura

Research Haruto MinegishiJulius KurtzMasami KomatsuIbuki Takeya Midori AnzaiTamaki Anzai
ONLO Johannes KleemanTadaya HirutaYuuki AnzaiYuuko TamaruKubo
R2PC Kaname ShiraseSusumu Sofue

Other Characters
Civillians Akio KanoEkaKaori SumimoriKatsuki SumimoriKousuke ChizuMakoto TamaruMana SumimoriMio SumimoriMisaki TakenamiSaki SumimoriSayuri Tenjo Shizuku Takenami Toshiro SakakiYasuhiko TakeyaYuzuru Kikuhara
Bar Cross Minami Okino
Bar CALM Kiwako Oe Ryunosuke KatagiriWataru Akase
Meteorology Plus Yuichi UtsumiYuriko Hyuga
Asahi Railways S.S TamiyaYousuke NakamuraYoriko Narumi
Shirase Hospital Akihito KanzakiFeng Jing