Kobeni Higashiyama (東山 コベニ Higashiyama Kobeni?) is a former Public Safety Devil Hunter who started as a new recruit working under Makima's experimental squad. Kobeni later resigned from the experimental squad after the battle against the Darkness Devil in Hell.
Kobeni is a petite young woman with short black hair tied in a ponytail. On her face are four moles, two under her left eye, one in the lower right side of her mouth and one on her left cheek. She normally wears a professional suit and she has two hair-clips.
At the newbie welcome party, she wore a hand-me-down dress from her older sister which was considered to be cute by a couple other devil hunters.
Kobeni is exceptionally cowardly with few moments of courage. Her first confrontation with the Eternity Devil lead to her being paralyzed with fright and babbling. She is shown to easily crack under pressure and breaks down in tears when the group becomes trapped in the hotel and she is confronted with the possibility of them all starving to death without any rescue.
Her sense of fear causes her to take drastic action in order to save herself such as turning on Denji and threatening him at knifepoint once a devil promised to free her in exchange for Denji's life. She even went as far as accusing Hirokazu Arai of being a spy for the devils because he defended Power from Kobeni's delusional accusations. Despite how she acted towards them in her panicked state, she did feel remorse for her actions and gratitude towards Hirokazu for shielding her when they were attacked.
However when Kobeni gets into action she had proven to be cool-headed and efficient, ruthlessly dealing with both the Katana Man and Akane Sawatari and forcing them to retreat; only breaking down in a panic once the fighting is over.
Despite being forced into a line of work that she hates by her family, Kobeni still cares about them as she sends her money to her brother to support him through college and chauffeurs her family around in her car.
Kobeni is shown to enjoy alcohol, especially when it is paid for by someone else. Her hobby is to eat tasty things. She loves the flavor of ice-cream which she has only experienced three times in her life.
In grade school Kobeni had her parents buy her an ice-cream just once for her birthday. The first taste was described by her as being so good that she broke into a run, tripped and dropped the ice-cream.
Kobeni became a devil hunter partially because her parents forced her into work in order to support her elder brother to be able to go to college. Faced with the choice of becoming a sex worker or a devil hunter, Kobeni opted to become a devil hunter and joined Public Safety despite wanting to go to college too.
When Himeno announced that the person who kills the devil will receive a kiss on the cheek from her as a reward, she hugged Kobeni and said that having a reward would be so much more motivating. Inside the hotel, Kobeni followed the others while growing more nervous and muttering to herself. Aki questioned Himeno on the two newcomers and Himeno stated that Kobeni pretty talented but also timid.
The group encounter what appears to be a walking decapitated head which leads at Kobeni who babbles in fright and can't move. The head is caught by Himeno and sliced in two by Power. As they progress through the Morino Hotel Power threatens Kobeni to test Himeno which causes Himeno to choke Power with her Ghost Devil arm as a warning. When the group discover that they're trapped on the eighth floor of the hotel both Himeno and Aki ask Kobeni to stand still and make double peace signs as they test the limits of the trapped space.
Kobeni begins to panic and worries that they'll starve to death and Hirokazu tries to reassure her by reminding her of why she wanted to become a devil hunter. Power laughs at Kobeni's misery while Himeno tries to calm her down and warns her that fear is a devil's favorite food.
Kobeni ended up breaking down in panic and tried to drink from a toilet. She was subsequently knocked out by Himeno and put in a bed. When the Eternity Devil appears to Denji, Power, Aki and Himeno and offers them a contract to release them from the hotel in exchange for Denji's life, Kobeni emerges from her room with a knife and demands Denji to let the devil eat him.
She rushes at Denji with her knife but Aki swiftly disarms her and she is knocked down by Himeno who elbows her in the chest. The Eternity Devil laughs mockingly as she's taken down. Later in her paranoia Kobeni begins to blame Power for their current state even though it doesn't line up with her abilities as a Blood Fiend. Hirokazu tries to talk some sense into her but Kobeni accuses him of defending a fiend which must make him a spy for the devils. As they both freak out their combined fear fuels the Eternity Devil who grows and begins to manipulate the space, tilting it while demanding Denji's heart.
Kobeni begins begging for anyone to kill Denji. When Hirokazu holds down Denji, Kobeni tries to use her knife to stab him but accidentally stops Aki who dove in the way of her attack. Kobeni tries to claim it isn't her fault and blames Denji for not allowing himself to be eaten. Denji backs up and says he will get eaten, but as part of his plan to fight the Eternity Devil and force it to surrender. Kobeni watches on in shock and horror with the others as Denji transforms and violently cuts himself out of the Eternity Devil's mouth.
After waiting over the course of three days for the battle between Denji and the Eternity Devil to be over, Kobeni sits in the corner in an exhausted state.
Once they leave the Morino Hotel, Himeno orders Kobeni and Hirokazu to report the incident to Public Safety. Kobeni later attends a newbie welcome party for Division 4. She introduces herself, revealing her age and hobby but keeps the identity of the devil she's contracted with a secret. A few other devil hunters comment that her dress is cute.
After the party Kobeni heads home, commenting that alcohol on someone else's tab is the best-tasting alcohol of all.
Kobeni was among the devil hunters targeted during the Gun Devil's plot to assassinate to the Special Divisions of Public Safety. An elderly lady pulled out a pistol and shot at her in broad daylight alongside Hirokazu.
Hirokazu was hit in the neck first but managed to shield Kobeni with his body to save her at the cost of his own life. Kobeni was able to kill their attacker and later went to save Denji shortly afterwards.
As Kobeni appeared on the scene, Akane Sawatari tried attacking her with the tail of the Snake Devil but Kobeni easily evaded it and ran across the Snake Devil's body to attack. She cut off the arm of the Katana Man before he could fire his gun, and caught his weapon out of the air to shoot him in the back. She tried to shoot Akane as well but ran out of bullets and had to take cover behind Denji's body in order to avoid Akane's counterratack. Akane retreated in a van that she loaded the Katana Man onto, leaving Kobeni behind with Denji. Kobeni glanced down at Denji and apologized for trying to kill him before, while reflecting on Hirokazu who sacrificed himself for her. As she breaks down, she announces she'll quit as soon as she sees Miss Himeno.
Kobeni took part in the raid against the terrorists lead by Akane, and was instrumental in capturing her by surprise after she held a knife to Akane's throat. When Aki questioned why Kobeni didn't quit Public Safety like she planned to, Kobeni sheepishly replied than their bonuses were due soon.
Kobeni attempted to ambush Reze alongside the Violence Fiend. After seeing that the Violence Fiend's attack was ineffective and hearing him tell her to retreat, Kobeni promptly collapsed and claimed that her legs wouldn't work. She frantically apologized to Reze and begged for mercy, claiming that she'd quit her job. Reze resumed her pursuit of Denji, leaving Kobeni to panic.
Kobeni and the Violence Fiend went out on a patrol and encountered an unknown devil which the Violence Fiend killed. When Kobeni questioning what type of devil it should be reported as, the Violence Fiend ventured a guess that it was a Grapes Devil. They took a break afterwards and the Violence Fiend bought Kobeni an ice-cream as a treat.
Kobeni tells the Violence Fiend of a story from her childhood when she first tried ice-cream before commenting that for a Violence Fiend he isn't a very violent person. He agrees with her and explains that it is due to still retaining a lot of his human brain. He explains that he can't remember much except that Makima saved him. Suddenly a man appearing to be Kurose appears in a bullet-riddled car claiming that his partner and master were both gunned down. He orders them to report the incident to HQ and they run off to obey to him.
Kobeni and the Violence Fiend are persuaded by 'Kurose' to release him from the hospital and the three of them meet up with the group protecting Denji. Power notices Kobeni's car and asks if it is hers before getting inside of it and demanding a ride. Kobeni nervously tries to stop Power but Power inexplicably drives the car straight into Denji and the assassin impersonating Kurose. Power immediately blames Kobeni for the incident and calls her a murderer, but after it is revealed that Kurose was an assassin she claims all the credit while Kobeni remains miserable inside of her car.
Later Kobeni kneels down by her car to inspect the damage and anxiously worries about how much it will cost to fix the dent.
Kobeni and the Violence Fiend accompany Kishibe outside of the mall where Denji's group is being attacked by the puppets controlled by Santa Claus. Kishibe instructs Kobeni and the Violence Fiend to take care of the remaining dolls in the area while he faces off against Quanxi's fiends.
Kobeni and the Violence Fiend are engulfed in darkness like everyone else in the department store when Santa Claus calls upon the Hell Devil to send everyone inside to Hell. After being transported to Hell, Kobeni looks around in shock.
When the Darkness Devil appears and blitz through the group of devil hunters summoned to Hell, Kobeni has her arms cut off like everyone else leading to her to look at her empty sleeves in confusion.
As the Darkness Devil begins slaughtering everyone, the Violence Fiend asks her to take off his mask and hide herself which she does.
Aki later informed Denji that Kobeni turned in her resignation from Public Safety.
Kobeni is revealed to be working as an employee at the restaurant Family Burger after accidentally summoning Chainsaw Man to her by calling for help after being abused by another employee. After two employees are killed by Chainsaw Man, he sits down beginning to yell out incoherently before Kobeni manages to interpret his cries as "Hamburger", and grabs a meal to take to him. She trips, spilling the meal across the floor and Chainsaw Man, only prompting him to cry out louder as another meal is prepared. An employee yells at Kobeni, saying that they were all going to die because of her before being promptly decapitated by Chainsaw Man. Grabbing the second meal to take to him, Kobeni walks forward before falling over and once again spilling the meal onto Chainsaw Man. After a fourth employee is decapitated, Kobeni picks up the bits of the dropped hamburger and hastily re-assembles it before slamming it down onto the table in front of Chainsaw Man.
After Chainsaw Man consumes the smashed burger, he picks up Kobeni with his intestine and walks her out of the restaurant. He takes her to get an ice-cream cone, where she states that "It doesn't taste like anything". Then at the request of Chainsaw Man, Kobeni begins to play a game of Dance Dance Revolution. She gets a perfect score.
After finishing, she turns around to find Chainsaw Man sitting behind her, as well as Makima sitting on the roof of a building across from her. Kobeni tries to deny her involvement in the current events, but Makima tells her that she did have a "great deal" to do with it, and that her fear of Chainsaw Man had grown weaker. As Makima aims and fires an attack at Kobeni, a black spear made from Angel's power, Chainsaw Man moves in front of her and pushes her out of the way, with the spear piercing him in her place.
Kobeni ends up in an underground safehouse with Denji and Kishibe. Having witnessed Makima's attack, Kishibe warns her that she will not be able to contact her parents ever again. Kobeni is glad that she finally has a reason to not contact her parents, and breaks down and reveals her fears, telling Denji she is jealous of his regenerative abilities. Denji shares his emotional wellbeing with Kobeni, as he never had any real control over his life, much to what Kobeni can relate to, being forced to make money in a dangerous job to send her older brother to college. As Denji watches the TV, at people cheering his name, he suffers another emotional breakdown, leaving Kobeni in fright.
According to Himeno, Kobeni is talented, but she is held back by her timidness. This is later proven true when Kobeni manages to single-handedly defeat the Katana Man in his human form and forced Akane Sawatari to retreat.
Enhanced Agility: Kobeni has an impressive level of agility, being able to dodge a tail attack from the Snake Devil before running across its body, a feat that prompted the Katana Man to call her a monkey.
Unknown Devil Contract: Kobeni has a contract with an unnamed devil whose identity she keeps a secret.
Driving: Kobeni possesses a driving license and her own car, which she primarily uses to chauffeur her family around but her exact skill is unknown as the only time she has been seen in the vehicle was when Power crashed it.
|5. A Way to Touch Some Boobs||Absent|
|7. Meowy's Whereabouts||Absent|
|8. Chainsaw vs. Bat||Absent|
|13. Gun Devil||Appears|
|14. French Kiss||Appears|
|15. Endless 8th Floor||Appears|
|16. The First Taste||Appears|
|17. Kill Denji||Appears|
|18. Chainsaw vs. Eternity||Appears|
|19. Nobel Prize||Appears|
|21. Taste of a Kiss||Appears|
|22. Cola-Flavor Chupa Chups||Absent|
|25. Ghost, Snake, Chainsaw||Absent|
|26. The Gun is Mightier||Absent|
|27. From Kyoto||Absent|
|28. Secrets & Lies||Appears|
|29. Perfect Score||Mentioned|
|30. Bruised & Battered||Absent|
|31. The Future Rules||Absent|
|32. Over and Over Again||Absent|
|33. Mission Start||Absent|
|34. Full Team||Absent|
|36. Katana vs. Chainsaw||Absent|
|37. Train, Head, Chainsaw||Absent|
|38. Easy Revenge!||Absent|
|40. Love, Flower, Chainsaw||Absent|
|41. Before the Storm||Absent|
|42. Teach Me How to Swim||Absent|
|43. Jane Fell Asleep in the Church||Mentioned|
|44. Boom Boom Boom||Absent|
|45. A Fine Day for Explosions||Absent|
|46. The Melody of a Massacre||Absent|
|47. Luck With Women||Appears|
|48. Kaboom Kaboom Kaboom||Absent|
|49. Shark Hurricane||Absent|
|51. Dark Diving||Absent|
|52. Lost Love, Flower, Chainsaw||Absent|
|53. In a Dream||Absent|
|54. To Go to Enoshima||Absent|
|55. Let's Go||Absent|
|56. A Curse and A Fist||Appears|
|58. Yutaro Kurose||Absent|
|60. Quanxi and Fiends' 49-Person Massacre||Absent|
|61. News Reporter||Appears|
|62. Super Mess||Appears|
|63. Trip To Hell||Appears|
|64. Welcome To Hell||Appears|
|65. The Darkness Devil||Appears|
|67. The First Devil Hunter||Absent|
|68. Dark Power||Absent|
|69. Shining Power||Absent|
|80. A Dog's Feelings||Absent|
|82. Always Eat A Hearty Breakfast||Absent|
|83. Death, Resurrection, Chainsaw||Absent|
|84. Hero Of Hell||Absent|
|85. Bloody Good Gut Feeling||Appears|
|86. Date Chainsaw||Appears|
|87. Chainsaw Man vs. the Horrifying Weapon Humans||Absent|
|88. Star Chainsaw||Absent|
|89. Go Get 'Em, Chainsaw Man||Appears|
|90. Super Power||Absent|
|91. Power, Power, Power||Absent|
|92. Zombie, Blood, Chainsaw||Appears|
|93. You & Crappy Movies||Appears|
|94. Chainsaw Man vs. the Weapon Humans||Absent|
|95. Chainsaw Man vs. Control Devil||Absent|
|96. This Kind of Taste||Absent|
|97. I, Love, Chainsaw||Absent|
- Kobeni's surname Higashiyama means "east" (東) (higashi) and "mountain, hill" (山) (yama).
- Kobeni has the same moles as Togata from Fire Punch, another manga by Tatsuki Fujimoto.
- Kobeni's ranking in the Popularity Polls are as follows;
- Kobeni ranked 8th in the First Popularity Poll, with 9,580 votes.
- Kobeni's car ranked 7th in the First Popularity Poll, with 9,878 votes.
- Kobeni ranked 10th in the Second Popularity Poll, with 22,862 votes.
- Kobeni's car ranked 15th in the Second Popularity Poll, with 9,269 votes.
- Kobeni ranked 8th in the First Popularity Poll, with 9,580 votes.
|Public Safety Devil Hunters||Aki Hayakawa † • Angel • Beam † • Denji • Furuno • Fushi † • Galgali † • Himeno † • Kato † • Kishibe • Kobeni Higashiyama ‡ • Kusakabe † • Madoka ‡ • Makima † • Masaki Ando † • Michiko Tendo † • Nakamura † • Nomo † • Power † • Prinz † • Subaru † • Tamaoki † • Tanabe † • Yutaro Kurose † • Hirokazu Arai †|
|Civilian Devil Hunters||Akane Sawatari † • Aldo • Denji ‡ • Hirofumi Yoshida • Joey † • Quanxi • Santa Claus ‡ • Tolka †|