How Old Is Rui From Demon Slayer

Aoi from 'Demon Slayer' is one of the intriguing characters, isn't she? Although her exact age isn't vividly stated, going by her appearance and the series time period, she seems to be in her teens, specifically around 16 years old. Interesting thing to note is that the series gives fans an engaging insight into the world of demon slayers, but leaves a bit of mystery when it comes to some character details.

I remember when I first stumbled upon 'Demon Slayer', I was completely hooked by its stunning animation and gripping storyline. The series is rated TV-14, which generally means it's suitable for viewers aged 14 and up. However, I've noticed that maturity levels vary, so some younger teens might handle it fine, especially if they're used to action-packed anime. The show does have intense fight scenes, some blood, and dark themes like loss and revenge, which might be intense for younger kids. If you're a parent, it's worth watching an episode or two to gauge if it's appropriate for your child. Personally, I think it's a fantastic series for older teens and adults who enjoy deep narratives and breathtaking visuals.

Genya Shinazugawa, a crucial character from 'Demon Slayer', is about 16 years old during the main timeline of the story. His youthful impetuosity is a big part of his charm!

Honestly, Yushiro is one of those characters who makes me pause and think about what 'age' even means in 'Demon Slayer: Kimetsu no Yaiba'. Physically he looks like a young man—teenage to early twenties at best—with that pale face and soft features that make him seem almost timeless. But the series treats demons differently: their apparent physical age and their true chronological existence don't have to match. The official manga and anime never give a neat birthdate or exact number for Yushiro, so we end up reading clues instead of a clear stat line. From what we see on panels and in flashbacks, Yushiro was turned into a demon before the main Taisho-era timeline unfolds, and he’s been Tamayo’s companion for a long while. That suggests his true age as a demon is at least multiple decades. He isn’t presented as an ancient first-generation monster like some of Muzan’s earliest creations, though—his bond with Tamayo and his quieter, almost childlike demeanor give the vibe of someone who was turned later and kept under Tamayo’s protective care. Fans often estimate a range rather than a precise year: physically late teens, chronologically something like decades old, with a possibility of being roughly a century or less depending on when Tamayo’s own timeline started. I like thinking about it in human terms: if you asked Yushiro on a park bench (yes, I picture him like that sometimes), he'd shrug and say his face doesn’t match his experience. That’s part of what makes him interesting—he brings the loyalty and knowledge of someone who's lived through a lot, but he keeps the softness and curiosity of youth. If you want a concrete takeaway: there isn’t an official age number in the source material, so the safest call is that his physical appearance is teenage, while his actual time as a demon stretches back decades. It keeps him mysterious, and honestly, that’s a big part of his charm.

When it comes to sheer power and impact, "Muzan Kibutsuji" has to be said would take over as the demon Slayer being in strongest demon In possession and control of all the demons, Muzan introduces a frightening element of shuddering fear that even demon exterminators at the peak of their powers must feel. Wholly capable of metamorphosing and creating others into demons, while in addition his impervious defense plus many-sided attack left people helpless before him--this combination has made Muzan an even more daunting opponent than before.

Man, 'Demon Slayer' has such a wild cast of characters, and Lisa definitely stands out! From what I recall, Lisa isn't actually a demon in the series—she's more of a fan-created character or sometimes confused with other figures in the fandom. The official demons in 'Demon Slayer' are like Muzan Kibutsuji's crew, with their tragic backstories and flashy Blood Demon Arts. Lisa might pop up in doujinshi or fan theories, but canonically, she doesn’t exist as a demon. That said, the idea of a demon named Lisa is kinda fun to imagine—maybe she’d have a scythe or something edgy. The series already does demons so well, blending horror and sympathy. If Lisa were real, I’d hope she’d have a tragic past like Akaza, where you almost root for her. But yeah, no Lisa in the official lore—just fan love filling in gaps!

Saitama from 'One Punch Man' wouldn’t fit into the Demon Slayer Corps—not because he lacks power, but because his entire character defies the struggle central to 'Demon Slayer.' The Corps thrives on relentless training, camaraderie, and facing life-or-death battles against demons. Saitama, though, ends fights with a single punch, bored by the lack of challenge. His nonchalance would clash with the Corps’ passion. Imagine Tanjiro’s earnest speeches met with Saitama’s deadpan 'meh.' Moreover, the Corps’ hierarchy and rules would irritate him. He’s a hero for fun, not duty. While his strength could obliterate Muzan in seconds, his presence would undermine the narrative tension. 'Demon Slayer' is about human resilience; Saitama’s invincibility would make the demons seem trivial. He’d probably nap through a Hashira meeting or complain about the uniform. The Corps needs warriors who grow—Saitama’s already peaked.

In 'Demon Slayer: The Demon Hunter', the title of strongest demon is a fierce debate, but Muzan Kibutsuji stands above all. As the progenitor of demons, his power is unmatched—regeneration so rapid even sunlight can't fully erase him instantly, strength to level buildings with a flick, and blood that transforms humans into demons or annihilates them. His shapeshifting is flawless, letting him disguise as anyone, and his mere presence paralyzes weaker demons. What truly terrifies isn't just his might but his cunning. He manipulates centuries of schemes, embedding cells in other demons to spy or explode them at will. Yet his arrogance is his flaw; he fears Tamayo's research and the Demon Slayers’ unity. Unlike flashy Upper Ranks, Muzan’s horror lies in subtlety—a whisper in the dark that’s already inside you.