Fanfic / The Ultimate Big Brother

The Ultimate Big Brother is a Danganronpa/One Piece Crossover created by Goku D. Uzumazi.

After his defeat at the hands of Luffy, Charlotte Katakuri wakes up to find himself inside Hope's Peak Academy, meeting with Makoto Naegi and learning about the place. However, while meeting the rest of his new little brother's classmates, the whole gang find themselves stuck in a Killing Game by Monokuma. Will the second son of Big Mom find a way to save everyone in the class?

The Ultimate Big Brother provides examples of:

• Alternate Universe: Beyond the obvious, all three casts are present in one killing game, and from the looks of things, Chiaki is the actual Chiaki, meaning she wasn't killed by Junko.
• Big Brother Instinct:
  • Even though he's not connected by blood to any of the class, Katakuri has this, but holds it in particular to Makoto and Himiko. Messing with Makoto is an easy way to find yourself on his bad side as Mondo finds out, and he is more than willing to play along with Himiko and let her call him her big brother.
  • Aoi's hostage to try and get her to commit murder is her little brother Yuta. However, because Katakuri told them it would be better to not give into fear and paranoia, she feels that she's weak for letting it get to her. However, Big Mom's second son counters that as long as she doesn't let it twist her into a Knight Templar Big Sister and drives her to become someone she's not, she's not weak for worrying about him.
• Berserk Button:
  • Just like in canon, trying to get a look under Katakuri's scarf and get a glimpse at his mouth is a guaranteed way to infuriate him.
  • Katakuri is also not happy if people mock his Trademark Favorite Food, and this worsens if the food was gifted to him.
• Brains Evil, Brawn Good: Downplayed. Junko's greatest strength is her analytical ability and manipulation skill while Katakuri's strengths lie in being an experienced, superhuman warrior. However, Katakuri is far from stupid, being skilled at leadership and being incredibly experienced when it comes to people like Junko.
• Broken Ace: Katakuri discusses this trope with Akane, who'd been pushing herself to become ever stronger so as to protect her little siblings. Katakuri discusses how it felt being this trope after swearing to become The Ace.
  The very thought of living up to their standard as the Perfect Child of the Charlotte Family was anything but tormenting. Day and night, I had to live up to that standard. What makes it worse was that I was the one who placed that curse upon myself. It'll make you extremely stressed out, high-strung, volatile...it's self-destructing. If what I described to you of the feeling of everyone relying on you intoxicating, then the downside will be the toxic side. I barely had time to let myself go. Whenever I do, it's either during my ten-minute merienda, snack time, or the late-night hours. But even then, the constant thought of everyone watching your every move expecting nothing but perfection? It's depressing.
• Bullying a Dragon: What Hifumi, Hiro, and Hiyoko do when they try to get a peek under Katakuri's scarf, ignoring the fact that Katakuri is 16 feet tall, rippling with muscles, and is a Voluntary Shapeshifter.
• Childish Villain, Mature Hero: Monokuma is incredibly childish, prone to viewing suffering at the expense of others as hilarious but also throwing tantrums should things not go his way, whining and considering those trying to ruin his fun as killjoys. Katakuri, by contrast, is The Stoic, even compared to those in the class like Kyoko, Celeste, or Kirumi, taking the events in stride and keeping a keen, tactical approach to the situation he's found himself in.
• Commonality Connection: Katakuri and Hina bond over both having the same Trademark Favorite Food of donuts.
• Creepy Good: Remember how Devil Fruits are put under Nightmare Fuel? This is played for full effect with Katakuri, where his abilities are more like a Lovecraftian Superpower in the (relatively) more grounded Danganronpa series. His introduction, while meant to be a childish prank, comes off as more of something out of a horror movie, with a Blob Monster taking human form while releasing a wave of predatory instinct. That's not even mentioning his stoic attitude, gargantuan size, unbelievable strength, unfriendly disposition, and massive trident Mole. Many of the students are downright terrified of him, with Mukuro, someone who's faced death several times, having her legs tremble like a newborn fawn. Most of the other students have similar responses, though with more people getting to know him, he is becoming less and less scary to them.
• Curb-Stomp Battle: Akane, seeing how strong Katakuri is, challenges him to single combat. When they do fight in Chapter 21, Akane is obliterated, with her getting exhausted with everything she throws at Katakuri, while the Sweet Commander barely breaks a sweat.
• Curb Stomp Cushion: Regardless of the aforementioned battle, Akane doesn't completely get wiped, and she does manage to land a hit that causes a Kung-Fu Sonic Boom.
• Drama-Preserving Handicap: The story takes great effort to remind the reader that Katakuri is still suffering the after-effects of his fight with Luffy, having pain from his self-inflicted wound and generally being somewhat weaker than normal. Even still, he can escape, but his worry about the students is primarily what keeps him from simply tearing out the doors and leaving, feeling that doing so may end up leaving them to be butchered.
• Driven to Suicide: After realizing the gravity of what she had done, Sayaka is filled with regret and shame for her actions, and decides it would be better for everyone if she were to kill herself, feeling that she threw Katakuri and Makoto under the bus and betrayed her friends' trust.
• Edible Ammunition: Just like in canon, Katakuri has enough strength to let him use jelly beans as ammunition. While the class is confused at first (Monokuma outright guffaws at this, feeling that Katakuri is being an idiot and giving it as a peace offering), he makes it clear what he can do when he scraps the military-grade gatling gun Monokuma used to try and kill him and then catches it as it ricochets back.
• Evil Is Petty: This is pretty much Monokuma's reason for spitting out and mocking donuts Hina gave to Katakuri: he wants to get under Katakuri's skin any way he can just because he can.
• Excellent Judge of Character: Thanks to his experience on the Grand Line, Katakuri is able to note that Monokuma is primarily motivated by sadistic bloodlust and the desire to crush hope, and he exploits these traits to play the bear like a fiddle, telling him that if he kills all of the students at the beginning, he'll never be able to sate his bloodlust. He is able to better determine the personalities of Makoto's fellow classmates, being able to catch Mukuro's struggles with acting like Junko, and even discerns that she's working with the mastermind due to familial ties, realizing that Junko is the Big Bad.
• Experienced Protagonist: Katakuri is this, having a lot of experience on the Grand Line both as a fighter and a commander, and he uses it to help take command of the situation, working to help the class endure through Monokuma's attempts to make them kill one another.
• Face of a Thug: Just as in canon, Katakuri is not exactly a friendly looking person, with his constant glare and Glasgow Grin and his mouth being hidden under his scarf. Combine that with his biker attire, and both Mondo and Fuyuhiko wonder if he was in a gang. Regardless, Katakuri has a good heart, and wants to save as many students as he can, and is more than capable of Pet the Dog moments.
• Female Gaze: Katakuri is subjected to this from Miu, with her considering him an absolute hunk and drooling over him.
• Foil:
  • Katakuri and Junko serve as this to each other.
    • Katakuri is Creepy Good with his Glasgow Grin and unnatural abilities while Junko, being the Ultimate Fashionista embodies Beauty Is Bad.
    • They're on opposite sides of Brains Evil, Brawn Good; Childish Villain, Mature Hero; and Older Hero vs. Younger Villain. Katakuri is an immensely powerful warrior reaching the age of 50 who keeps a very stoic, tactical approach while Junko is a teenage analytic schemer, a Manipulative Bastard, and a Psychopathic Manchild.
    • Katakuri has a powerful Big Brother Instinct that extends even to those not of his real family while Junko is abusive to her older sister Mukuro.
    • Katakuri is The Stoic (with occasional flashes of being Not So Stoic) while Junko is a Troll who gets off on causing conflict and belittling others.
    • Katakuri is a Jerk with a Heart of Gold who cares for all of the students despite being fairly antisocial while Junko is Faux Affably Evil, her playful personality a mask for the monstrous sadist underneath.
  • Katakuri is also one to Makoto.
    • While Makoto is one of the shortest males in the entire cast at 5'3, Katakuri is the tallest of the entire cast, standing at 16'8.
    • Makoto is an Ordinary High-School Student and a Rookie Red Ranger whereas Katakuri is a powerful warrior with unnatural abilities (his Devil Fruit and Haki) and a sub-leader in one of the most powerful pirate crews in his world.
    • Makoto is a natural Nice Guy and All-Loving Hero who wants to get along with everyone, Katakuri is a stoic Jerk with a Heart of Gold who prefers being alone.
    • Makoto's greatest strengths are his optimism and ability to make friends with anyone while Katakuri's greatest strengths are his fighting prowess and leadership experience.
• For the Evulz: Katakuri discusses this with Makoto after the first trial when he talks to the Ultimate Lucky Student about Junko being the mastermind, telling him that where he comes from, there's no shortage of such people that would destroy everything just because they felt like it (Crocodile and Doflamingo come to mind).
  Katakuri: Where I'm from, my world has countless people like Junko who desire chaos above all else. No money, no reason, no bargaining. Just wanting to see the world burn with everyone screaming is a demon's dream come true.
• Good Is Not Nice: Katakuri embodies this trope. Make no mistake, he's firmly against Monokuma and will do what it takes to save as many of the students as possible. However, Katakuri is not unwilling to harshly reprimand them for their actions if he feels that they're going to make things worse, and can still be violent to them if properly provoked.
• Good Is Not Soft: Again, Katakuri is this. He is actively trying to save the students, but he is also incredibly powerful and willing to use that strength if he must, whether it be to make students listen to him or breaking Monokuma's weapons.
• Jerk with a Heart of Gold: Katakuri definitely is this. He's fairly anti-social to most of the class while being rather stoic, and he also isn't unafraid to be violent if they anger him. Underneath that, however, lies someone who genuinely cares about others and is more than willing to Pet the Dog and form strong friendships, and is unwilling to sacrifice the lives of the students just so he can escape, instead attempting to save as many of them as he can.
• Mass "Oh, Crap!": Definitely the overall reaction to Katakuri's introduction by everyone but Makoto, Himiko, and Akane. He's stronger, faster, and bigger than anyone in the entire group, and the fact he's a stoic, no-nonsense individual with supernatural abilities who is more than willing to strike if angered makes things more frightening for them.
• Misplaced Retribution: Because Makoto was the one who introduced Katakuri to the group while Monokuma revealed the Killing Game, Hiyoko, Tenko, and Toko all gang up on Makoto and begin calling him the one responsible for the Killing Game.
• The Mole: At least two are confirmed so far: Tsumugi Shirogane and Mukuro Ikusaba (though the Ultimate Soldier does reveal her role to Katakuri and Makoto after the former confronts her about it).
• My God, What Have I Done?: After Sayaka is saved, Katakuri confronts her for her actions, pointing out that her idol group would more than likely be disappointed in her because she fell to murder, and afterwards, Sayaka is left immensely regretful of her actions.
• New Friend Envy: Tenko develops this as Himiko bonds more with Katakuri than her, not at all helped by the fact that Katakuri is male.
• Nice to the Waiter: Katakuri sincerely compliments Teruteru for the meal he makes, stating that he's never seen anyone outside his family do as well as the Ultimate Cook did. Considering that his family includes Chiffon and Pudding, it's incredibly high praise.
• No-Nonsense Nemesis: Katakuri develops this with Monokuma, being stoic in the face of all of Monokuma's attempts to goad him and treating him as seriously as Doflamingo.
• No-Sell: Thanks to the Mochi-Mochi Fruit, Katakuri is able to shrug off the fire from a gatling gun, doing a Bullet Catch by having his mochi catch each bullet and then release them after the gun is done firing.
• Not So Above It All: Just like in canon, this is one of Katakuri's traits. He usually comes off as a stoic, no-nonsense individual, but he is more than capable of being playful (his introduction is basically a massive, childish prank he drags Makoto into, and gets more than a little satisfaction in frightening Shuichi's group, particularly Kaito), and his love of donuts hasn't ceased in the slightest, endearing him to Hina.
• Odd Friendship: The stoic, giant, Face of a Thug, and serious Charlotte Katakuri gets along surprisingly well with the bubbly, friendly, social, and kind-hearted Aoi Asahina. Both bond over having the same Trademark Favorite Food, and Katakuri reassures the Ultimate Swimming Pro that her worrying about her little brother doesn't make her weak.
• Older Hero vs. Younger Villain: Junko is a Teen Genius, but also a sadistic psychopath who wishes to crush the hope of the Hope's Peak students by forcing them into a Killing Game. By contrast, Katakuri is 48 years old, and while he is a pirate, he's a Jerk with a Heart of Gold who opposes her and genuinely cares for the other students.
• Outside-Context Problem: Katakuri is way stronger than the rest of the Ultimates, and even with that, he wields outright unnatural abilities thanks to his Haki and Mochi-Mochi Fruit. He's also able to read Monokuma like a book and lacks any form of weakness that Monokuma can find to get him to commit murder, and he is utterly unafraid and unimpressed by Monokuma, discounting Junko as "...if Doflamingo and Caesar Clown [had] a kid and that kid [got] thrown away".
• Pet the Dog: Katakuri has a number of these moments.
  • He helps Himiko reach a staff out of her reach and lets her call him "Big Bro".
  • He reassures Chihiro that his plan would have worked had it not been for Monokuma finding out, and earlier protects the Ultimate Programmer from the bear's wrath.
  • He forms a bond with Asahina over their Trademark Favorite Food, and reassures the Ultimate Swimming Pro that worrying about her little brother doesn't make her weak at all, affirming that he believes she is strong.
  • When Mikan begins undermining herself in one of her self-deprecative rants, Katakuri reassures her that Sayaka would appreciate what she did to make her look presentable, and compliments her for not falling to the mob mentality Monokuma wants to instill in the rest of the class, deciding to see for herself the truth by asking Katakuri directly instead of blindly believing Monokuma's words.
  • While he does chew Sayaka for her actions, he talks her down from committing suicide, telling her that the fact she feels guilty about what she did means that she is not a monster in his eyes and that she still has a chance to make things right, assuring the Ultimate Pop Sensation that he forgives her.
  • After the first trial, he tells Makoto that while he may be naive, it's a breath of fresh air for him, and that his kindness will one day prove useful, and the little things like being nice to everyone and believing in them will make him someone extraordinary.
  • Katakuri also compliments Teruteru for his work as a Supreme Chef, noting that he's never seen someone outside his family cook as well as he can.
  • When he realizes that Mukuro is working with Junko due to their familial ties, he bluntly tells her that Junko feels that she can simply replace her, family ties be damned. However, he does also tell the Ultimate Soldier that he knows she wants to get out of her sister's shadow and that she's better than what she thinks of herself, tells that Makoto finds her wonderful, and assures her that she's far more than a simple robot who follows orders, encouraging her to find her own path and break from her sister's clutches.
  • While Katakuri does defeat Akane in a Curb-Stomp Battle and has her reveal her need to be strong for her little siblings, Katakuri comes to her after the fight and relates his struggles as a Broken Ace as a result of his bullies attacking Brûlée, telling her that being the pillar for her family will lead her to breakdown. In addition, he also reveals the truth of origins, and when Akane, newly invigorated, tells him to prepare for the next round, Katakuri assures her that he will be waiting.
• Rules Lawyer: Katakuri uses Monokuma's own rules against him, preventing Monokuma from punishing Chihiro since he had never set a rule that the students couldn't break into his files.
• Secret-Keeper: As a means to help her understand that he's not so different from her, Katakuri reveals to Akane his true origins as a pirate from another world.
• Serious Business: It turns out that proper eating is this to Teruteru. When he finds out that Katakuri has had nothing but donuts in his life, he is furious, running out with eyes blazing and dressing Katakuri down for his poor diet. Katakuri is unfazed, but does give the Ultimate Chef the chance to change his mind, a challenge Teruteru eagerly accepts.
• Shout-Out: During her emotional war of breaking free or serving Junko, one of the questions Mukuro confronts is "It's time that you look inward and ask yourself the big question! Who are you? And what do you want?"
• Spanner in the Works: If Junko's plan is a complex set of gears, then Katakuri is mochi that gums up and jams the gears. Because of his presence, things go awry quite a lot. He's not only able to stand up to Monokuma and calm the students down and get them into a more rational state, he's also able to save Sayaka and Leon, averting any deaths thus far. Tsumugi, any time he's shown up, is mostly struggling at how to try to keep the Killing Game in motion thanks to him causing no shortage of problems.
• Spared by the Adaptation:
  • Given Chiaki's presence in the game, and the fact it doesn't appear to be a simulation, the real Chiaki was never killed by Junko to drive her class to despair.
  • While Sayaka seemed to be dead, Katakuri realizes that the knife stopped the bleeding and is thus able to save her life, though gives her a blistering "Reason You Suck" Speech when she recovers.
  • Junko never attempts to murder Mukuro out of boredom or to prove herself as the one in control since she tried and failed to use Katakuri as a Sacrificial Lion.
  • In canon, no one was able to help Leon after his battering from The Thousand Blows due to the fence separating them from him but here, the much stronger Katakuri rips the fence that separates him from the Ultimate Baseball Star and saves his life, though he is left comatose.
• Talking Down the Suicidal: Katakuri helps Sayaka recover after she's Driven to Suicide, reassuring her that while her actions were indeed abhorrent and there are those like Byakuya and Kyoko who won't forgive her, she still has people like Hina and Keebo who believe in her, and Makoto is still teetering between trusting her or dismissing her. He also tells her that she is not a monster because she knows that what she did is wrong and feels regret for it, unlike Monokuma who knows he's in the wrong and gives no care about it. Katakuri concludes his response by giving Sayaka an Affectionate Gesture to the Head and telling her that he forgives her.
• Too Dumb to Live: Oh yes, Hifumi and Hiro. It's a great idea to try and look under the scarf of someone who could probably snap you all like a twig and see what he's hiding, even when it's made obvious that it's not something he's comfortable with, and Makoto is clearly trying to get him to calm down. Suffice it to say, Katakuri erupts in anger and everyone learns that you don't push his Berserk Button.
• Underestimating Badassery: Monokuma does this to Katakuri, but justified by the fact that Katakuri has outright supernatural abilities rather than simply being superhuman like the other Ultimates. While he does give credit to Katakuri for standing up to him, he treats the pirate with as much respect as he does the rest of the class. He even attempts to have Katakuri be the Sacrificial Lion to show how serious he is, using a gatling gun to riddle him with bullets. Thanks to the Mochi-Mochi Fruit, however, Katakuri is utterly unaffected, and retaliates with destroying the gatling gun with a jellybean, much like he did to Jigra.
• Waking Up Elsewhere: Katakuri wakes up in Hope's Peak where he had previous been in Brûlée's Mirro-World.
• Warrior Therapist: Katakuri, during his duel against Akane, decides to try and understand what drives her to fight, and when she answers that she wants to become stronger, he pushes her to reveal that it's for her little siblings. While it does break her afterwards, Katakuri does later come to her and reveal his own struggles with being The Ace of his family and how it saddled him with all manner of pressures.
• What the Hell, Hero?: After Makoto struggles to defend himself from the Misplaced Retribution of Toko, Tenko, and Hiyoko, the three of them get called out for their blaming of him and generally wasting time by the rest of the class.
• You Remind Me of X: While not said out loud, it's fairly clear that Katakuri sees a lot of Luffy's attributes within Makoto: Makoto's will and courage remind Katakuri of the Straw Hat, and he's a Magnetic Hero like Luffy is while also being open to making friends with anyone.