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Novel & Pilot
The villain in the prequel novel Death Note: Another Note: The Los Angeles BB Murder Case.
- Alliterative Name: Beyond Birthday.
- Ax-Crazy: Easily the most unhinged character (and that's saying a lot). He's a brutal, sadistic psycho who kills his victims in rather horrific ways.
- Batman Gambit: He's counting on L reacting in a certain way.
- Because Destiny Says So: He kills people he sees are at the end of their lifespans.
- A bit of Fridge Logic here. If you consider that only people with the Death Note are supposed to be able to change a person's destiny based on seeing their lifespan, those people would probably have died from Beyond himself, not from something else like he said to justify his actions. To be fair though, he couldn't have known that. Even more Fridge Logic when you think about the fact that if he hadn't had the Shinigami Eyes, he wouldn've have seen their lifespans, and wouldn't have decided to kill them, and their lifespans would have lasted longer. Their lifespans were shorter simply because he could see them.
- Butt-Monkey: He's Always Second Best and there's the instance where he's stepped on by Naomi Misora. Also there's the whole failing to achieve his goal of "calling out L" with his Evil Plan thing-the poor guy couldn't even kill himself properly. And later while he's serving time in prison he's killed by Kira.
- Calling Card: The wara ningyo.
- Can't Catch Up: As hard as he worked to be the next L, L never saw him as an an equal, just a Backup.
- Carry a Big Stick: Clubbed to death, knifed to death, beaten to death- he's not too picky as long as he carries out his objective of making his target dead.
- Cast of Snowflakes: Played straight in the book. BB is only supposed to bear a vague resemblance to L.
- Averted in most fan-art, where he looks almost exactly like L.
- Cloudcuckoolander: Just like L, B has odd quirks and mannerisms.
- Criminal Mind Games: Among other games and codes BB sends a Crossword Puzzle indicating who he's going to kill next to the police.
- Cruel and Unusual Death: For his victims if the state of the corpses is anything to go by.
- Curb-Stomp Battle: As Mello points out, "how humiliating for him"...
- Cute and Psycho: Well he's a psycho and he looks like L. 
- Dark Is Not Evil: Subverted. He comes off as very creepy from his first appearance but due to Mistaken Identity the audience is made to think he's a good guy. Turns out he's really Dark Is Evil all along.
- Death Seeker: B had planned it so he would be the final victim.
- Deceptive Disciple: No student at Wammy's House ever put so much effort into BEING L...
- Defiant to the End: "I have never once been submissive even to a traffic light."
- Detective Mole: Naomi Misora is very impressed by Ryuuzaki's uncanny ability to decipher BB's codes.
- Depraved Homosexual: Or possibly Depraved Bisexual (we don't get to see enough of him to know for sure.)
- The Determinator: Because of his Eyes B knows that everything dies, everything falls apart but he presses on anyway. He also already knows that his death alone won't be enough to make L notice but creating a puzzle he can't solve will.
- Deuteragonist: To Naomi
- Drives Like Crazy: "I have never even been submissive to a traffic signal!"
- Embarrassing Nickname: Backup.
- Evil Counterpart: To L. Indeed B goes out of his way to be this. Also to Mello (L shares B's story with Mello perhaps because he is afraid that that Mello would turn out like his predecessor) and Light (though Kira kills far more people; B is more sadistic and his brand of villainy is more immediately terrifying and has a much more personal touch.)
- Evil Laugh: If Shinigami could breed you'd think he was related to Ryuk - he has his laugh.
- Evil Twin: To L, though he might not be (indeed, probably is not) a literal twin.
- Fame Through Infamy: His entire goal is to surpass L... not by becoming the world's greatest detective, but by becoming the world's greatest criminal.
- Fan Boy: he's an Otaku as well as being L's deranged fanboy.
- The Fatalist: It comes with knowing when everyone is going to die.
- Full-Body Disguise: Used when "testing" Naomi Misora.
- A Glass of Chianti: Or rather A Jar Of Strawberry Jam used to the same effect (is it jam or is it blood?) with the added bonus that some fans find it cute.
- Irritation Is the Sincerest Form of Flattery
- The Killer Becomes the Killed: He died in prison of a sudden heart attack, suggesting it was actually the result of a Death Note.
- Master of Disguise: As part of his creepy obsession with L.
- Murderers Are Rapists: In Fanon, at least. In the novel itself, there is no mention of BB raping any of the people he killed.
- Mysterious Past
- Namedar: He was born with the Shinigami eyes.
- Named Like My Name: "Ryuuzaki" copied the copycat when choosing an alias.
- Neat Freak: Justified, as he needs to meticulously clean his victims' houses to avoid leaving any trace evidence behind.
- Ninja Pirate Zombie Robot: L's evil doppelganger/Wammy's Kid/Serial Killer/born with Shinigami eyes. He's not a typical DN OC Mary Sue but a very scary Big Bad.
- Obfuscating Stupidity
- O.C. Stand-in: He is a very mysterious figure in canon, and like Matt, much of his characterization comes from Fanon.
- Pet the Dog: His friendship towards A.
- Running on All Fours: He frequently crawls around in a freaky way.
- Sadist: He likes to kill his victims in rather painful ways.
- Seme: Self-described as "an aggressive top".
- Serial Killer: It's hinted that the 3 from the novel are just his known victims. Keep in mind, too, that the time between his leaving of Wammy's House and the events of the novel only span about 3 months.
- Superpowerful Genetics: Somehow he was born with the Shinigami eyes.
- Sweet Tooth: B must surpass L at everything, even sugar consumption. "It's sweet dirt."
- Things That Go "Bump" in the Night: When he's introduced he comes crawling out from under a bed.
- Trademark Favorite Food: Strawberry jam.
- The Unfettered: He will do whatever it takes to get L's attention.
- Voodoo Doll: Or rather wara ningyo left at every crime scene.
- "Well Done, Son!" Guy: He just wants L to notice him!
- Woobie, Destroyer of Worlds: He was an orphan boy who witnessed his parents die, was born with the Shinigami eyes and apparently knows how to read the lifespan numbers so he has seen death all around him all his life. Furthermore, B was never seen as an individual with his own merits-just L's Backup.
- Would Hurt a Child: One of B's victims was 14 year old Quarter Queen.
A student at Wammy's House in the prequel novel Death Note: Another Note: The Los Angeles BB Murder Case.
- The Rival: Of B and L since they were are all competing for the title.
The 13-year-old protagonist of the Death Note Pilot chapter (which takes place in a different continuity than that of the main series). Technically, this makes him the first of the Kiras.Mikami's appearance, but not his personality, was based on Taro's.
- Back from the Dead: He dies at some point, then comes back to life, but not with his mind entirely intact, some believe. Ryuk asking him what he thought of the Land of the Dead brings out a rather shaky and suspicious smile.
- Bad Dreams: His victims haunt him in his dreams. Had he been the protagonist of the main series, it's doubtful that he could have gone as far as Light did.
- Death Is Cheap: The Death Eraser.
- Defeat Means Friendship: Taro and the main antagonist part on good terms, with the antagonist thanking Taro for stopping him and then apologizing for almost killing him.
- Diary: Not knowing what it was, he intially used the death note as a diary. Unlike Light, Taro can't read English (he knew what "note" meant, but not "death").
- Face Death with Dignity: Kind of. He allows himself to be killed with the death note to prove that he's telling the truth to the police officers. He even jokes a little when giving instructions on what to write for cause of death. Of course, he's quickly revived with the Death Eraser
- From Bad to Worse: Even after he revives his victims with the Death Eraser.
- From Nobody to Nightmare: Seemingly insignificant and unpopular kid who eventually has the entire student body scared out of their wits.
- Halfway Plot Switch: At first, Taro is something of a Villain Protagonist who is trying to avoid being found out. Then, once he revives everyone he kills, he spends the rest of the pilot acting as a Kid Detective, trying to find the killer who has taken his place.
- When you compare it to the main series, it feels like a condensed version of everything Light went through from the first chapter all the way to the end of the Yotsuba arc.
- Happy Ending: The ONLY Kira who gets one of these, folks.
- I Wrote Our Story: Cue Epileptic Trees.
- Kids Are Cruel: Taro is a favorite target for the school bullies.
- Lighter and Softer: When compared to Light. However, since he actually came first, you could say that Light is a Darker and Edgier replacement for him.
- Long Haired Prettyboy: After the Time Skip.
- Not So Different: It turns out that the pilot's real villain is basically another kid who, like Taro, was constantly picked on and initially killed people by accident.
- Person of Mass Destruction: Potentially, though he isn't shown using the notebook this way.
Characters only in movies
Played by: Yuu KashiiLight's girlfriend in the live action movie.
- Always Save the Girl: Subverted.
- The B Grade: She's annoyed that Light keeps effortlessly outdoing her in school.
- Composite Character: She's the smart girl on campus like Takada (though Takada does appear later in Higuchi's role) and also fulfills the same role as Yuri, aka the Girl from the Bus. Also she has a strong sense of justice, is studying to be a prosecutor, and is very protective of Light—like another of Light's allies who never got any screentime in the live action movies—a Gender Flipped prenote!Teru Mikami?
- Foil: To Light, especially when he's in gloating Kira-mode.
- Hello, Attorney!: She's studying to become a prosecutor.
- I Let Gwen Stacy Die: With a really nasty twist.
- Incorruptible Pure Pureness: "One day Shiori is going to understand..." (that KIRA IS JUSTICE!!!) Sure, buddy. This is the same girl that gets ticked off at you for making bets on sporting events and you think she's going to be cool with mass homicide?
- Selective Obliviousness: She seemingly refuses to see what (in the film) is blindingly obvious.Light: IF I were Kira I'd probably do the exact same thing...Shiori: No you wouldn't - that's not like you at all!
Played by: Youki KudohThe Big Bad of L: Change The World also known as Dr. Kimiko Kujo.
- Bad Is Good and Good Is Bad: She and her henchmen feel very complimented when one of their victims calls them "no better than Kira."
- The Chess Master: Well, she wants to be.
- Create Your Own Villain: Another graduate of Wammy's goes batshit.
- Eviler Than Thou: At least Light cares about the human race.
- Heel–Face Turn: At the end.
- Karma Houdini: It's made clearer in the light novel that she's arrested for her crimes, but she's made a Heel–Face Turn by that point and faces her arrest with dignity.
- Knight Templar: Little Miss Captain Planet wants to Kill All Humans to save the earth.
- Meaningful Name: A vicious Bitch in Sheep's Clothing Animal Wrongs Group Leader that wants to infect everybody with a deadly virus named Kujo. Coincidence?
- Misanthrope Supreme: Humans Are Bastards that are destroying the planet so the Perfect Solution is to release The Plague Depopulation Bomb, killing them all!
- A Pupil of Mine Until He Turned to Evil: "Watari had such high hopes for you."
- Theme Naming: K is an associate of L's who wants to kill a bunch of people in order to build a new perfect utopia. Sound familiar? Well prepare to be disappointed because it's not K as in Kira.
- Utopia Justifies the Means
- The War on Straw: No, this is not the argument of the Green movement... Nor is this why anyone supported Kira. The Author Tract is taken Up to Eleven in the Novelization.
- Well-Intentioned Extremist
- Woobie, Destroyer of Worlds: In the novel, Matoba killed her father when she was a child. As a result, she injected the virus in all of the Blue Ship members, including Matoba, in revenge.
- You Killed My Father: To Matoba in the light novel.
Played by: Masanobu TakashimaThe Dragon to K in L: Change the World
- Asshole Victim: K points out his true colors right before he dies.
- The Dragon: To K.
- Eviler Than Thou: Proves to be even worse than K, as all he cared about was making money.
- Good Scars, Evil Scars: Making Bond villains everywhere proud.
- Karmic Death: In the novel.
- Obviously Evil: Even moreso than K.
Played by: Kiyotaka NanbaraThe FBI Agent in L: Change The World.
- Becoming the Mask: He was sent to spy on L and obtain the Death Note but he stayed with him even after it became apparent L had already destroyed the Death Note because he genuinely wanted to help.
- But Not Too Foreign: Lampshaded when no one will believe he's an F.B.I. agent because he's Japanese.
- Butt-Monkey: "Why do I always have to be the decoy?!"
Played by: Miyuki KomatsuA token female member of the Kira Taskforce added in the Live Action movies.
Played by: Kazuki NamiokaAnother graduate of Wammy’s house that shows up in L: Change The World.
- Atrocious Alias: Seriously. His alias at the school for genii is F. Maybe that was part of the reason he was reassigned to Thailand.
Played by: Shingo TsurumiAn immunologist and the father of Maki Nikaido in L: Change The World.
- Good Doc, Bad Doc: The good doctor.
- Take Care of the Kids: In the novelization, just before his death, he sent an e-mail to L's computer which said to take care of his daughter.
- Too Dumb to Live: There's a part in the novelization when his security system detects an intruder, but instead of being alarmed he just brushes it off. This act of carelessness also leads to his demise.
Played by: Mayuko FukudaDaughter of Dr. Nikakido. She's also one of the kids that L has to protect in L: Change The World.
- Children Raise You: Tells both L and Near off for their eating habits .
- Cooldown Hug: is given one of these by L
- Damsel in Distress: gets kidnapped, but she does at least try to defend herself, and she is fully capable of turning herself into a human bomb trying to destroy the terrorists who killed her dad
- Ill Girl: she has a slow acting virus inside her, plus she has low blood sugar, which is the very thing keeping said virus at bay
- Morality Pet: strangely enough L acts as this for HER, keeping her from killing K
- Security Blanket: Maki's teddy bear.
- Taking You with Me: She attempts to do this.
Characters in 2016 Live-Action Movie
The antagonist of the 2016 film, Death Note: Light Up the New World. A cyber-terrorist who idolizes Kira.Portrayed by: Masaki Suda
- Affably Evil: Despite being a serial killer, he's very courteous to the people he executes.
- Light Is Not Good: Early promotional posters for the movie depict him dressed completely in white. And he's the villain. Quite fitting, as he's emulating his predecessor Light Yagami, who was a literal example of the trope.
- Man in White: All of his clothes are white or very light-coloured.
- Walking Spoiler: Promotional blurbs for the film states that he "inherited the DNA" of Light Yagami. However, while it's revealed that Light had a child, Shien isn't that child.
L's counterpart for the new film. Named as "Ryuzaki" in promotional material.
- Anime Hair: A bushy moptop with blonde streaks.
- Dark Is Not Evil: Dedicated to stopping the rise of a new Kira and an early poster for the movie has him dressed all in black, contrasted with villain Shien Yuki who wears white.
- Jerk with a Heart of Gold: He's pretty rude at the best of times, but he always comes around for his allies.
- Malevolent Masked Men: A non-traditional example. He's not a particularly nice person, but not as amoral as his predecessor L and only uses the mask to protect his face.
- Reincarnation: Early promotional material states that he "inherited L's DNA." Make of that what you will.
A police officer who finds himself caught in the conflict between Ryuzaki and Shien.—-
- Easily Forgiven: Ryuzaki forgives Mishima, even giving him the L legacy.
- Memory Gambit: It turns out he's the real Neo Kira, not Yuki Shien, and he pulled a memory loss trick a la Light Yagami, ten years earlier.
- Red Herring: Throughout the movie, we're led to think he's the new protagonist and Yuki Shien the villain. But in fact, he's Neo Kira. And his real name is Ryo Nakagami.
- Walking Spoiler: It's almost impossible to talk about him without revealing a major twist.
A newly introduced Shinigami for the 2016 film.Voiced By: Miyuki Sawashiro
- Butter Face: Inverted. While she has the anatomy of a giant insect standing on its hind legs, her face is quite pretty.
- Expy: She's essentially a Gender Flipped version of Sidoh/Shidoh from the original series.
- Heroic Sacrifice: She saves Ryuzaki and Mishima from being killed by Nanase, going out the same way as Jealous and Rem.
- Love Martyr: Her relationship with Ryzaki borders on romantic and he states that she may give up her life for him.
- She ultimately does.
- Nice Girl: She's very pleasant, not taking pleasure in other's suffering like Ryuk does.
- The Pollyanna: Never seen in a bad mood.
- Trademark Favorite Food: Grapes.
A Death Note holder from the 2016 film, Death Note: Light Up the New World.
An original Shinigami for Death Note: Light Up the New World that accompanies Sakura Aoi.
- Advertised Extra: Appears for all of one scene and is never seen or referenced again.
- Ambiguous Gender: It's not entirely clear if Bepo is male or female.
- Expy: of Armonia from the original manga and anime.
- Gold Makes Everything Shiny: Has golden skin.
- Mr. Exposition: Gives the Kira Task Force additional information regarding the Death Notes.