5 Anime Mentors Who Changed the Hero’s Life Forever
Ahmed Riaz
Mentor figures in anime are those who have the most impact on the protagonist. They train them beyond their limits and teach them important life lessons throughout their respective series, even inspiring fans. While all of them are pivotal to a protagonist’s development, a select few mentors in anime have drastically shaped the destinies of heroes.
These mentors don’t just offer wisdom or advice to the protagonist as the series progresses. All five have sacrificed something or committed an act that would forever change the protagonist and, as a result, even the narrative.
All Might’s Decision to Make Deku His Successor Created MHA’s Greatest Hero
Deku kneels in front of All Might in My Hero AcademiaImage via Bones
My Hero Academia is one of the most popular hero genre anime of all time. Izuku Midoriya, mostly known as Deku, was born Quirkless, but was still determined to become a hero. On one fateful day, he met All Might, his idol and Number 1 Hero. After witnessing the protagonist save others at the risk of his own life, All Might decided Deku was worthy of his Quirk, One For All, one of the most powerful in My Hero Academia.
That decision wasn’t a light one, as he was aware of the danger it posed for Deku. However, All Might trusted that the protagonist had the potential to become the greatest hero. Although Deku’s journey was traumatic and many villains would push his limits, he eventually fulfilled his dream. He was arguably a bigger inspiration than All Might for many, including a few villains. Still, without All Might’s help and sacrifice to diminish his own Quirk, Izuku Midoriya wouldn’t have come so far, and My Hero Academia wouldn’t even exist.
Koro-Sensei Restored the Self-Worth of Class 3-E
Koro-sensei draws on school board with octopus-like hands in Assassination ClassroomImage via Lerche
While Assassination Classroom might not be the most palatable anime for every viewer, Koro-sensei’s relationship with Class 3-E is incredibly wholesome and motivational. The students of Class 3-E are purposefully isolated from the rest of the school as a psychological tool against the “superior” students to maintain their grades. This rigged system made Class 3-E give up on studying altogether and instead cause chaos. This changes when Koro-sensei gets assigned as their teacher.
Although Class 3-E is tasked with killing Koro-sensei by the end of the school year, which is nearly impossible with his superpowers, the teacher-student dynamic steadily grows, especially with Nagisa Shiota. Koro-sensei taught them how to rise above their low status, tailored his teaching style to each student’s needs, and fixed their weaknesses. Every anime fan agrees that they would love a teacher like Koro-sensei. Without his presence in Assassination Classroom, Class 3-E would’ve remained ostracized and shown no growth.
CBR Exclusive · One Piece Quiz WHICH ONE PIECE LEGEND ARE YOU? Set sail — Quiz sequence initiated ⚓ The Grand Line stretches endlessly before you. Across its treacherous waters, legends are born — forged in Devil Fruit power, unbreakable will, and the fierce loyalty of a crew that would sail into any storm. Twenty questions. One legendary result. Your adventure begins now. 🌊
🍖Luffy
⚔️Zoro
🗺️Nami
📖Robin
🍳Sanji
01
The Going Merry is ready to leave port. What’s your first move? 🚢 How you set sail says everything about who you are at sea.
02
A Marine warship is blocking your route. You: 🏴☠️ Crisis response reveals your true pirate nature.
03
You find a Devil Fruit on the table. What do you hope it is? 🍈 The fruit you crave is the power you were always meant to have.
04
What is your one, unshakeable dream? 🌟 Every great pirate sails for something deeper than treasure.
05
The Thousand Sunny docks at a new island. First stop? 🏝️ What you do first in port reveals your deepest priorities.
06
Your greatest weapon aboard the ship? ✨ Every Straw Hat has one thing that makes them irreplaceable.
07
What’s your natural role when things get tense? 🪝 The pressure moment is where your true function reveals itself.
08
Honest confession — what is actually your biggest flaw? 😬 Even the greatest pirates have one thing they’re still working on.
09
A crewmate is in serious danger. You: 💪 How you protect the people you sail with is who you truly are.
10
Halfway across the Grand Line. What keeps you going? 🌟 Not the crew’s reason. Yours. The private one.
11
You lost the fight. The crew is watching. Now what? 😳 How you rise after falling is what separates legends from passengers.
12
Your bounty poster just went up. What’s on it? 💰 The World Government describes you the way your enemies see you.
13
Free day on a peaceful island. What actually happens? 🌴 How you rest is a window into what drives you when no one’s watching.
14
What does your crew actually say about you behind your back? 📋 The people who sail with you see the version you can’t.
15
Which Haki do you feel most aligned with? 🔮 The Haki you master reflects the deepest truth of who you are.
16
What does it truly mean to you to be a pirate? 🌊 Not Garp’s definition. Not the Marines’. Yours.
17
In a hundred years, what will they say about you? 🎬 The Void Century has room for one more name. What does yours mean?
18
A Warlord of the Sea is blocking the path forward. You: 👀 Warlords don’t intimidate legends. They reveal them.
19
The crew celebrates a big victory. Your contribution? 🎉 How you celebrate says as much as how you fight.
20
You reach Laugh Tale. The One Piece is real. What do you do? 🔥 Twenty questions. One truth. No turning back now.
⚓ The Grand Line has made its judgement ⚓ YOUR ONE PIECE LEGEND
Your scores are revealed below! The character with the highest number is your One Piece counterpart. Read their profile to discover your true pirate destiny. 🌊
🍖 Luffy
⚔️ Zoro
🗺️ Nami
📖 Robin
🍳 Sanji
You don’t understand the word impossible — not because you’re naive, but because you genuinely never accepted that it applied to you. You charge into every situation with the full force of your personality, your body, and your heart, and somehow the universe rearranges itself to accommodate you. You don’t lead through command; you lead through being so completely, recklessly yourself that everyone around you becomes a better version of who they were. You eat too much, feel too loudly, and care too deeply. The world calls it recklessness. Your crew calls it home. 🍖
You have made exactly one promise and you have organised your entire existence around keeping it. Stoic to a fault, terrifying in combat, and somehow always facing the wrong direction — you are the immovable foundation that the whole crew leans against when everything else shakes. You don’t ask for recognition. You don’t need it. The work is its own reward. The sword is the path and the path is the sword. You will lose a thousand times before you reach the top, and you will get back up every single time. That is not stubbornness. That is who you are. ⚔️
You are sharper than anyone in the room and you know it — but you also know exactly when not to show it. Pragmatic, resourceful, and carrying more than you ever show on your face, you are the reason the ship reaches anywhere at all. Every route was planned by you. Every impossible weather reading, every near-catastrophe avoided — that was you. The world tried to take everything from you once, and you built something extraordinary out of the wreckage. You love the people you’ve chosen fiercely, quietly, and without much ceremony. The map isn’t finished. You’ll get there. 🗺️
You spent so long being hunted for what you know that you forgot — briefly, painfully — that you were also worth loving for who you are. You carry the weight of erased history in your memory and the quiet certainty of someone who has survived what should have been unsurvivable. Calm where others panic, perceptive where others miss everything, and in possession of a dark humour that still catches people off guard. You don’t trust easily, and when you do, it is the most complete and devastating loyalty imaginable. You want to know the truth. You deserve to live to read it. 📖
You have principles carved so deep they function like a skeleton — invisible, structural, and the thing holding everything else upright. You cook for people because food is love expressed at its most honest. You fight for the crew because protecting them is the most natural thing in the world. You are elegant, occasionally absurd, capable of extraordinary tenderness and absolutely terrifying combat in the same five-minute span. You came from darkness and chose light so deliberately and so completely that it became your defining act. The sea called and you answered. All Blue is out there. You’ll find it. 🍳
Monkey D. Luffy Wouldn’t Have Set Sail Without “Red-Haired” Shanks
One Piece’s world is vast, but it revolves around Monkey D. Luffy, the captain of the Straw Hat Pirates, who currently holds the Mythical Zoan Fruit, the Human-Human Fruit, Model: Nika. Although his journey began when he was 17 years old, it was “Red-Haired” Shanks who sowed the seeds when he was 7 years old. Without Shanks and the Red Hair Pirates staying on Foosha, Luffy would not have desperately wanted to become a pirate nor aimed to be the King of Pirates. However, Shanks’ influence runs deeper than this.
Shanks had acquired Luffy’s Devil Fruit, publicly known as the Gum-Gum Fruit back then, by stealing it from Who’s-Who. While it’s not revealed yet in One Piece what he intended to do with it, Luffy’s hunger did not discriminate, and he ate it. Moreover, the mountain bandit kidnapped Luffy on a boat as revenge against Shanks. When the Sea King attacked the boat, Shanks came to the boy’s rescue, sacrificing his arm in the process. While later chapters reveal a hidden ulterior motive, Shanks’ bravery is fundamental to Luffy’s resolve.
That’s not the last of it. As a parting gift, Shanks gave Luffy Gol D. Roger’s iconic straw hat. So, from saving his life to accidentally giving him legendary powers, Luffy owes Shanks everything. The Red-Haired Emperor may not have taught him as Silvers Rayleigh did, but Luffy’s destiny as the King of Pirates clicked into place because of him.
Jiraiya was Key to Naruto’s Emotional Development
Image via Studio Pierrot
Although Kakashi Hatake is the more popular mentor figure among Narutofans, Jiraiya had the most impact on Naruto as a character. Without the Toad Sage, the protagonist would never have grown as a person and become Hokage. Masashi Kishimoto goes about it devastatingly, with Jiraiya’s demise at the hands of his former pupil, Nagato, making it one of the saddest anime deaths. However, it was an important lesson for Naruto.
Jiraiya’s death forces Naruto to face the truth and understand the cycle of hatred. Although his parents died, the protagonist never knew them and hadn’t experienced real loss until Jiraiya, who became like a father figure during their travels together. Naruto’s grief and anger allowed him to sympathize with Sasuke and put himself in his rival’s perspective. Moreover, he mastered Sage Mode to honor Jiraiya’s memory and fulfill his dream of peace. Without this tragic turning point, Naruto’s profound themes wouldn’t have worked as effectively.
Tanjiro Carries on Kyojuro Rengoku’s Will
Rengoku speaks his last words to Tanjiro in Demon SlayerImage via Ufotable
Demon Slayer’s Mugen Train Arc is considered one of the best arcs, and the Flame Hashira, Kyojuro Rengoku, is the highlight of it. While Tanjiro has always been a good-natured person, Rengoku impacted his moral compass even more. His enthusiastic and fiery spirit is infectious. When Akaza killed the Flame Hashira, Tanjiro felt guilty for not being strong enough. However, Rengoku ensured that Tanjiro would leave this encounter stronger than ever.
Rengoku used his last words to comfort Tanjiro and motivate him. Rengoku’s one specific phrase, “Set your heart ablaze,” left a lasting impact on Tanjiro, and by extension, Demon Slayer fans. Now, whenever Tanjiro uses Sun Breathing, Rengoku’s words ring in his head. Although he hadn’t mentored him for long, their interaction limited to a single arc, the Demon Slayerprotagonist was never the same after Rengoku’s death. He became more responsible and determined, carrying on the Flame Hashira’s will.