The 10 Best-Written Side Characters in Anime History, Ranked

Anime is at its best when even its supporting characters are paid as much attention as the main characters. Some series utilize them for comedic relief, others as emotional grounding, and a select few as philosophical foils that nudge the narrative into more profound waters. Well-written supporting characters are those that feel like they could headline their own show. They add texture and insights that enrich their worlds beyond the protagonist’s point of view.

There are many side characters, like Nara Shikamaru and Nico Robin, who have stolen the show throughout anime history. Whether they are loyal sidekicks, manipulative schemers or tragic heroes, these supporting players prove that the weight of a story is rarely carried on the hero’s shoulders alone. Some evolve in unexpected ways, while others remain constant presences stabilizing the cast. What unites them all is the craft behind their writing: their motivations clear and their presence indispensable.

Sanosuke Proved Brash Fighters Can Still Be Deeply Written in Rurouni Kenshin

On the surface, Rurouni Kenshin’s Sanosuke Sagara may appear to fit the stereotypical beefy sidekick type: brash, hot-headed and more likely to swing first and ask questions later. While he is introduced as an enemy of Kenshin, Sanosuke quickly becomes one of the important allies of the series. His story is about finding his purpose after wandering aimlessly for years. Sanosuke’s appeal is found in the contradictions of his character. He is reckless, yet devoted above all else.

He is unpolished, but smart enough to realize when someone is suffering. His backstory as an ex-member of the Sekihō Army gives him emotional grounding and explains why he would cling to Kenshin’s ideals so vehemently once they meet. He is also the emotional balance to Kenshin’s calm philosophy. As Rurouni Kenshin unfolds, Sanosuke grows in ways that maintain his relevance.

Kaworu Left a Lasting Mark in Minutes in Neon Genesis Evangelion

Though Kaworu Nagisa makes a limited appearance in Neon Genesis Evangelion, he reframes the whole narrative. Kaworu is introduced late in the series, and he is distinct from all the other characters. He shows no judgment towards Shinji and offers Shinji a rare unconditional kindness that the world had shredded away. Their relationship forms nearly immediately, and it is well-written to the point that it almost feels natural.

Kaworu is often seen as a symbol of hope and love, but ultimately, he has demonstrated himself to be humanity’s foe as an Angel. He also muses about free will and existence, which adds to the philosophical depth of the series. Kaworu’s demise feels tragic because he only plays a momentary role. His choice to sacrifice himself for humanity compels a change in Shinji for the remainder of the series.

Reigen Arataka Became a Father Figure in Mob Psycho 100

Reigen Arataka begins as comic relief in Mob Psycho 100. He’s a self-proclaimed psychic who tricks clients with cheap parlor tricks, using his teenage apprentice, Mob, to do the actual heavy lifting. At first, it seems he’s nothing more than a scam artist leeching off Mob’s powers. But Reigen evolves into one of anime’s best-written side characters precisely because of his contradictions.

While his lies and selfishness create humor, Reigen’s true role is as Mob’s emotional anchor. He offers life advice, sometimes flippantly, but often with surprising sincerity. Reigen recognizes Mob’s humanity when others only see his psychic powers, helping Mob see himself as more than a weapon. Reigen’s arc is also about growth. The series gradually peels back his bravado to reveal a man who knows he’s flawed but still tries to be better for Mob’s sake.

Nico Robin’s Tragic Past Turned Her Into the Heart of the Straw Hats in One Piece

Nico Robin is among the most complex characters of One Piece. She was initially introduced as an enemy, but eventually integrates with the Straw Hats, carrying a tragic backstory with her. As the sole surviving member of Ohara, she carries around illegal information and the trauma of genocide. Robin is powerful, mysterious and incredibly smart, but her journey is marred by her struggle to believe that she is worthy of companionship.

The Enies Lobby Arc boils down to her development, as her angry cry of “I want to live!” is among the series’ most emotive scenes. Robin embodies resilience and the desire for human connection. She isn’t always in the limelight, but her presence provides an anchor for the Straw Hats.

Roy Mustang is arguably the most nuanced side character in shōnen anime. What at first appears as arrogance and ambition, Fullmetal Alchemist: Brotherhood gradually reveals to be ethical complexity. Beneath all the hot air is a man haunted by his role in the Ishvalan War and the horrors that he could not be made to undo. Mustang’s storyline is one of finding a balance between ambition and obligation.

This balance of justice and ego makes him interesting. He can be ruthlessly brutal, yet have great compassion. His personal relationships give depth to his character. His bond with Riza Hawkeye grounds him, and his guardian-investor-like relationship with Edward and Alphonse reveals his vulnerable side. Mustang is both ruthless and tender. He is neither hero nor villain, but something far more human.

Shikamaru Nara Proved Himself as Naruto’s Most Thoughtful Ally

Shikamaru Nara begins as comic relief in Naruto. His complaints and laziness paint him as the least likely future successful shinobi. Shikamaru’s power is not in brute strength like the majority of shōnen main characters, but in his mind. His growth as a character picks up during the Chunin Exams, where his strategic mind outmaneuvers fighters much stronger than him. But it isn’t until after Asuma’s death that Shikamaru truly makes a name for himself.

His eventual role as adviser to Naruto gives him astonishing depth. He is not just a genius sidekick, but a leader defined as much by compassion as intelligence. Shikamaru is relatable in his reserve, but admirable in his growth. His growth from a youth who avoids responsibility to a man who willingly shoulders it makes him one of the better-written side characters in anime.

Askeladd Was a Villain, Mentor, & Father Figure All at Once in Vinland Saga

Vinland Saga’s Askeladd is one of anime’s most complex and morally ambiguous side characters. At first, he seems wholly manipulative and cold-blooded, forever one step ahead of his enemies. Yet, as the story progresses, Askeladd is revealed to also be a man shaped by conflicting cultures, fury and resolve to his principles.

What’s so nicely written about Askeladd is the way he defies easy definition. He’s a killer and a liar, but he’s also a philosopher and a protector. His relationship with Thorfinn is, at the same time, mentor, foe and father, giving him one of the richest dynamics in the anime. Askeladd’s worldview challenges Thorfinn to grow beyond revenge, which makes him the true axis of the first arc in Vinland Saga.

Osamu Dazai Gave Bungou Stray Dogs Its Depth & Style

Osamu Dazai is a special kind of side character who steals the show without ever occupying the role of the main protagonist. A member of the Armed Detective Agency, Dazai immediately grabs attention with his off-kilter, suicidal sense of humor. But under the one-liners is one of the darkest and most carefully crafted characters in anime. What is so fascinating about Dazai is his duality. He’s odd and almost clown-like on the outside, but he is also a former Port Mafia executive.

The tension between his jovial demeanor and his troubling past lends him an amount of depth that few side characters possess. From his mentorship of Atsushi to the barely restrained cat-and-mouse game with Chuuya, Dazai’s relationships shape much of Bungou Stray Dogs. Dazai is a guide and an enigma, deftly keeping the audience guessing.

Homura Akemi’s Time-Loop Struggle Made Her Madoka’s True Emotional Core

Homura Akemi begins as a mysterious, stoic figure in Puella Magi Madoka Magica. She comes off as cold and even antagonistic, but she ends up having one of the most tragic character developments in anime. She is not the heroine, but her choices dictate every move in the narrative. Her existence as a time-looping character trying to save Madoka from tragedy makes her one of the most complex side characters in anime history.

With each reset, her innocence is lost, and she changes from a shy girl into a hard, calculating fighter who will stop at nothing to save Madoka. Homura is the greatest tragedy of devotion: the more devoted she becomes to keeping Madoka safe, the more she loses herself. Homura’s love and commitment are wonderful, but they propel her into morally questionable territory that rivals outright villains.

Kisuke Urahara Proved That Supporting Roles Can Steal the Show in Bleach

Kisuke Urahara represents everything that makes a side character memorable: he’s eccentric, mysterious, and has a lot more to him behind the humor. A shopkeeper who is shown to assist Ichigo initially, Urahara seems like comic relief in his striped bucket hat and joking demeanor. But layer by layer, he unfolds. He’s a former Soul Society captain exiled for dabbling in forbidden knowledge, a man who has been weighed down by guilt, yet still willingly helps others.

Urahara embodies the balance between comedy and weighty seriousness. He cracks jokes and clowns around, but when Bleach’s story demands it, he becomes a brilliant tactician, always a step ahead. He is the type of teacher who lets students literally stumble with the intention that they have to learn. At the same time, his morally gray actions keep the audience on their toes.