Demon Slayer: Kimetsu No Yaiba - To the Hashira Training (2024) Timeline Explained – Every Event in Order

The mark appears on Muichiro after killing Gyokko, the Upper Five Kizuki. In the Demon Slayer universe, Hashiras can awaken marks when facing extreme danger or life-threatening situations. This mark significantly boosts strength and speed, but it comes at a cost, Muichiro immediately collapses from exhaustion afterward.

• muichiro tokito
• mark awakening
• gyokko
• upper five
• hashira powers

Nezuko possesses a unique immunity to sunlight that no other demon has shown. During the battle with Hantengu, she burns when exposed to dawn, but crucially survives. This immunity is what Muzan discovers through Hantengu's memories, making Nezuko the key to his goal of achieving true immortality.

• nezuko
• sunlight immunity
• sun resistance
• demon transformation

Hantengu is Upper Four of the Twelve Kizuki who splits into multiple manifestations of his hatred. Zohakuten represents his hatred and attacks with wooden dragon Blood Demon Art, while Urami embodies his resentment, a smaller form that uses sonic shrieks. The true Hantengu hides within Urami's core, making him nearly impossible to defeat until Tanjiro discovers this secret.

• hantengu
• zohakuten
• urami
• upper four
• blood demon art
• manifestations

Muzan learns through Hantengu's fragmented memories that Nezuko is immune to sunlight, a feat no demon has ever achieved. Since Muzan's ultimate goal is immortality and invulnerability, consuming Nezuko would allow him to walk in the sun without dying, making her essential to his plans.

• muzan
• nezuko
• immortality
• sunlight
• twelve kizuki
• hunger for power

After beheading Urami, Tanjiro notices the body continues moving, realizing Hantengu must be inside. He recalls that demons often hide their true forms within their manifestations. By cutting Urami in half, Tanjiro exposes the real Hantengu hiding in his core, then drags him into sunlight to finish the fight.

• tanjiro
• hantengu hiding spot
• demon core
• sunlight kill technique

Nezuko's blood has unique properties due to her special immunity. When she splashes her blood on Urami, it ignites him in flames, likely because her blood carries the power of sunlight itself, which is lethal to demons. This ability proves crucial in turning the battle's tide.

• nezuko blood
• urami burned
• demon blood properties
• sunlight power

After Muichiro and Mitsuri both awaken their marks during battle, the Hashiras recognize they need special training to harness this new power. Stone Hashira Gyomei Himejima leads the initiative, with retired Sound Hashira Tengen Uzui assisting. They prepare to face Muzan directly when he comes for Nezuko.

• hashira training
• gyomei
• muzan coming
• mark awakening
• prepare for battle

The Infinity Castle is Muzan's extra-dimensional stronghold, a hidden realm where demons can move freely without sunlight concerns. The abandoned temple contains one of several portals leading to this location, which becomes the setting for the upcoming major confrontation.

• infinity castle
• muzan lair
• portals
• obanai
• sanemi
• demon realm

During the climactic fight, Nezuko's bamboo mouthpiece falls off as she survives the sunlight exposure. This allows her to speak for the first time in the story, marking a significant milestone in her recovery and humanity. Her ability to speak also signals her growing control over her demonic powers.

• nezuko speaks
• bamboo mouthpiece
• first words
• recovery

Mitsuri awakens her mark during the intense battle with Zohakuten, dramatically enhancing her strength and abilities. This power boost allows her to fight on equal footing with the Upper Four manifestation. Like Muichiro's case, extreme life-threatening stress triggers the mark's awakening.

• mitsuri kanroji
• love hashira
• mark awakening
• zohakuten
• enhanced powers

One week after the battle, Hotaru Haganezuka forges Tanjiro a new sword featuring the tsuba (handguard) from the late Flame Hashira Kyojuro Rengoku. This is a symbolic gift honoring Rengoku's legacy and the bond Tanjiro formed with him during the Mugen Train arc.

• tanjiro new sword
• rengoku tsuba
• hotaru
• flame hashira
• commemoration

Tamayo sends Tanjiro a letter reporting progress on her experiments using blood samples from the Twelve Kizuki. She's developing a concoction that could potentially reverse demon transformations back into human form, a breakthrough that could save many victims, including potentially Nezuko.

• tamayo
• blood sample experiments
• reverse demon
• cure research
• twelve kizuki