Demon Slayer has blown anime fans away with its stunning visuals, epic storyline, and loveable characters, all in the span of one season and one movie. In that time, the story introduced Tanjiro's story and set up his mission to turn his sister Nezuko back into a human and slay some demons along the way.

RELATED: Demon Slayer: 1o Things About The Series Manga Readers Know That Anime-Only Fans Don't

Season 2 is now on the horizon, and it's gotten a lot of anime-only fans excited to see what else this series has in store. Hopefully, some of the most pressing questions and theories will be addressed when the second season of Demon Slayer drops later this year.

10 How Much Has The Main Trio Improved?

demon slayer main trio of tanjiro, zenitsu, and inosuke

At the end of season one, Tanjiro, Zenitsu, and Inosuke are training at the Butterfly Mansion. They gradually get stronger and improve significantly over the course of the arc. They eventually master the Total Concentration: Constant breathing technique, and Tanjiro even begins to catch up with Kanao in their exercises together.

Viewers have had a chance to see the effect this training has had on them in the Mugen Train movie, but only briefly. Many fans can't wait to see the extent to which the boys have improved, hopefully as they do battle with more powerful demons.

9 How Strong Is Nezuko Now?

Nezuko from Demon Slayer.

During the fight with Rui, Nezuko fully awakens to her demonic powers, using fire magic to help save Tanjiro from death. Nezuko's new power is called Blood Demon Art: Exploding Blood, and as the name suggests, it allows her to combust her own blood into powerful flames.

It's a deeply emotional and amazing moment in the first season, but it leaves many questions. How did Nezuko gain this power without consuming human flesh? Does it only cause her blood to burn, or is there more to it? Is this the extent of her powers, or will she continue to grow stronger? Hopefully, she will perform some more spectacular feats in the next season so fans can see just how powerful she can be.

8 Which Of The Hashira Is The Strongest?

The Hashira from Demon Slayer.

The Hashira are all introduced together at the end of season one and command a strong presence on screen. All of them carry the air of seasoned veterans, and their status as the deadliest of demon slayers makes them all the more stunning. But which one of them is the strongest?

RELATED: Demon Slayer: The Hashira, Ranked By Style

Viewers don't yet know if there is an official ranking system among the Hashira, or if there is someone among them who is the ultimate demon slayer. It could be Giyu with his stoicism and 11th water-breathing technique, Sanemi with his cocky attitude and overwhelming speed, or perhaps one of the others.

7 How Is Tamayo's Blood Research Going?

Tamayo from Demon Slayer.

Partway through the first season, Tanjiro meets Tamayo, a doctor-turned-demon who is looking to find a way to transform demons back into humans. She asks Tanjiro to provide her with blood samples from overly strong demons to help her with her research.

Tanjiro collects some of these samples during his encounters but also misses opportunities to acquire some excellent samples as well. Have the samples Tanjiro provided been of any use to Tamayo? Is she any closer to finding a solution? Hopefully, she will provide Tanjiro with an update on her progress at some point next season.

6 How Strong Are The Upper Six Kizuki?

Akaza from Demon Slayer.

Fans who have seen the movie have already been treated to the ferocious power of one of the upper ranked Kizuki in what was an epic and climactic final battle scene. But what about the other five of the highest-ranked members? Are they as fearsome as Akaza, or potentially even more daunting?

Without the details from the manga, there is no telling whether or not more of the upper six Kizuki will show up next season. However, viewers will be in for some spectacular fight scenes of mind-blowing intensity if they do, especially if Azaka makes a reappearance.

5 What's The Deal With That Other Final Selection Victor?

Genya from Demon Slayer.

During the final selection, this youth acts quite violently toward the hosts of the event, eager to get ahold of his Michurin sword. Tanjiro sets him straight by breaking his arm, and he isn't shown again until a rude and brief encounter between him and Tanjiro in the Butterfly Mansion.

RELATED: Demon Slayer: 5 Anime Katana That Could Beat Tanjiro's Nichurin Sword (& 5 That Can't)

Anime-only fans haven't even learned his name yet, and it begs a lot of questions as to who he is and what his role in the story will be. Is there a reason he's incredibly violent and ill-tempered?

4 Why Does The Master Look Like That?

Kagaya from Demon Slayer.

When the Hashira are introduced at the end of season one, the revered master of the Demon Corps, Kagaya Ubuyashiki, also makes his first appearance. Many fans might have been put off by his appearance or confused why he looks the way he does. Regardless of his appearance, all of the Hashira show nothing but bountiful respect toward him, so he is clearly a man worthy of their admiration.

It's clear from how he interacts with others that his problem causes him blindness, as he can only vaguely sense people and things that aren't immediately in front of him. Was it some kind of accident that altered face and caused this loss of vision? It would be nice to get some more backstory on the famed master of the Demon Corps and find out what happened in his life to result in his current appearance.

3 Why Does Muzan Have A Human Family?

Muzan and His Family from Demon Slayer

Tanjiro is shocked to find out that Muzan Kibutsuji is pretending to live the life of a human, even having a human wife and daughter. It enrages Tanjiro greatly, but he never gets an answer as Muzan slips away and sends demons after Tanjiro.

Why does Muzan want to be a part of a human family? Is he fulfilling some deep-seated desire? Maybe it's the secret to how any demon can do the same thing, or go back to how they once were. Tanjiro and fans alike are eager to find out more about Muzan and his unique situation.

2 Why Can Zenitsu Only Fight While Unconcious?

Zenitsu from Demon Slayer.

It's made clear quite early on in the story that Zenitsu can only really fight against demons when he is unconscious in some way or another. However, when he is in this state, he performs some fantastic feats of demon-slaying, cutting down foes with razor-sharp precision and lightning-fast speed.

RELATED: Demon Slayer: 5 Anime Characters Zenitsu Could Defeat (& 5 He'd Lose To)

This could just be a quirk for his character, and fans may never get a proper answer for why Zenitsu can only fight when he's passed out. Some hints in his backstory in the show suggest it has something to do with his lack of bravery or when he was struck by lightning. Maybe the anime will provide some more information on exactly how it works or, at the very least, allow one of the other main characters to see him properly in action.

1 What Is The Secret Of The Hinokami Kagura?

Tanjiro from Demon Slayer flame attack

Tanjiro gives a beautiful display of raw power during his fight against Rui in season one. When all hope seems lost and his death is inevitable, he is saved by Nezuko and proceeds to charge toward Rui. During this charge, he remembers the dancing his father taught him, and it awakens his ability to use the fire breathing technique he calls "Hinokami Kagura."

Tanjiro then proceeds to try and find more out about this technique but has so far failed to get any information, even from the legendary Flame Hashira. Why has no one heard of this technique, and what mysteries does it hold? Will it give Tanjiro an insight into the kind of man his father was before he died? Either way, Tanjiro will hopefully use this technique more in season two and maybe even uncover the root of its origins.

NEXT: Demon Slayer: 10 Most Emotional Scenes From Season 1