# Demon Slayer: Kimetsu no Yaiba, Vol. 4
## Final Selection Arc (Continued)
- Tanjiro's Journey to Become a Demon Slayer
- Tanjiro Kamado completes his training under Sakonji Urokodaki.
- He participates in the Final Selection to become a full-fledged Demon Slayer.
- The intense battle against powerful demons during the selection.
- The Five Survivors
- Tanjiro meets other participants who pass the Final Selection.
- Giyu Tomioka, Zenitsu Agatsuma, and Inosuke Hashibira are introduced.
- Each survivor has unique abilities and personalities.
- Tanjiro's First Mission
- Tanjiro receives his first mission as a Demon Slayer.
- He travels to a town plagued by demon attacks.
- Encounters with civilians and understanding their plight.
## Tsuzumi Mansion Arc
- Arrival at the Tsuzumi Mansion
- Tanjiro and Nezuko arrive at the mysterious mansion.
- The eerie atmosphere and strange occurrences within the mansion.
- Tanjiro senses the presence of demons.
- Battle with the Hand Drum Demon
- Tanjiro faces the Hand Drum Demon, Kyochi.
- The demon's ability to manipulate sound and create illusions.
- Tanjiro uses his Water Breathing techniques to counter the demon.
- Unveiling the Truth
- Discovering the demon's backstory and motives.
- The tragic past of Kyochi and how he became a demon.
- Tanjiro's empathy towards the demon and his resolve to save humans.
## Development of Characters
- Tanjiro's Growth
- Tanjiro's determination to protect others strengthens.
- Improvement in his combat skills and strategic thinking.
- Deepening bond with his sister, Nezuko.
- Nezuko's Role
- Nezuko's protective instincts towards Tanjiro.
- Her unique abilities as a demon with human emotions.
- Interaction with other characters and proving her worth.
- Introduction of New Allies
- Meeting new Demon Slayers and potential allies.
- Learning about the Demon Slayer Corps and its structure.
- Building relationships with fellow Demon Slayers.
## Themes and Motifs
- Family and Sacrifice
- The importance of family bonds and sacrifices made for loved ones.
- Tanjiro's dedication to finding a cure for Nezuko.
- Humanity and Morality
- Exploring the thin line between humans and demons.
- Moral dilemmas faced by characters in their battles.
- Perseverance and Courage
- Overcoming fear and adversity through courage and perseverance.
- Inspirational moments that highlight the strength of the human spirit.