1. How did Genya figure out his demonic powers?

Question

2. Why does the demon slayer mark end one's life at 25 years specifically?

3. Why was Zenitsu given a sparrow instead of a crow?

4. How is it possible that the Muscle Mice can carry heavy nichirin katana?

5. Why did Genya want a color-changing katana in the Final Selection if he uses a gun and a short sword thing?

6. Why was Obanai not impressed by the death of the first Upper Moon in over a century and instead said it was "JUST Upper Moon Six"?

7. Is the "Hinokami Kagura" Sun Breathing itself?

8. How did Muzan figure out the whole demonizing thing?

9. How did Muzan find out his weakness to sunlight without being in the sunlight

10. What was the point of giving Tanjiro the ability to understand birds?

11. How come Zenitsu can't understand birds, but there are some scenes where he seems to understand Chuntaro?

12. If Doma is emotionless, why does he act like he has emotions?

13. How did Gyokko find the Swordsmith Village?

14. Why was Hantengu the only one brought along to the village when Doma wanted to go?

15. Does Kokushibo only stay in the Infinity Castle?

That's it. Idk how many are answerable, but I'd like to know if the answer doesn't exist.

Answer 1

1. Genya figured out his demonic powers when he ate demon flesh and survived, gaining enhanced abilities and senses.

2. The demon slayer mark ends one's life at 25 years specifically because it's the limit of how long a human can withstand the strain and burden of constantly fighting demons with their enhanced abilities.

3. Zenitsu was given a sparrow instead of a crow because he was not confident in himself and was not trusted to handle the responsibility of a crow.

4. The Muscle Mice are able to carry heavy nichirin katana because they are stronger and more durable than regular mice and have been trained for the task.

5. Genya wanted a color-changing katana in the Final Selection as a personal preference and for added visuals during battle.

6. Obanai was not impressed by the death of the first Upper Moon in over a century because he had a personal connection to the previous user of the position and did not see the current Upper Moon Six as a worthy replacement.

7. The "Hinokami Kagura" Sun Breathing is a specific technique within the overall Sun Breathing style.

8. Muzan figured out the whole demonizing thing through trial and error and experimentation with demon blood and flesh.

9. Muzan found out his weakness to sunlight through experimentation and observation of his own physical reactions and weaknesses.

10. Tanjiro's ability to understand birds serves as a symbol of his connection to nature and his overall empathy and understanding of all living beings.

11. It's possible that Zenitsu can understand birds, but it's not a focus of his character and is not specifically shown or mentioned in the story.

12. Doma may act like he has emotions as a means of manipulation and to better blend in with human society.

13. Gyokko found the Swordsmith Village through his ability to sense and manipulate sound waves, allowing him to locate and track down the village.

14. Hantengu was brought along to the village because he was the most skilled in deception and manipulation, which would be useful in infiltrating the village and gathering information.

15. Kokushibo primarily stays in the Infinity Castle, but can venture out when necessary or when he senses a powerful opponent.