The eldest brother in "Demon Slayer: Kimetsu no Yaiba" is Flame Pillar Purgatory Anjuro.

Yanzhu is known as the "big brother". In addition to his strong fighting power, what is more important is his unique personality charm. He is mature, steady, optimistic and kind, and cares about his younger generations all the time. Use your life to continue the belief of the Demon Slayer Squad. Yanzhu is the eternal big brother. As long as he is around, you will feel safe. Yanzhu fulfills the duty of Nine Pillars, protects everyone, and fights until the last moment.

The specific reasons why Yanzhu Purgatory Anjuro is called the eldest brother:

1. Fearless of life and death

During the battle with the nightmare, Tanjiro and others shouldered a heavy responsibility He was seriously injured and could no longer fight. At this time, the only person with sound fighting ability was Yanzhu. As the strongest and least injured person present at the time, Yanzhu resolutely stepped onto the front line of the battle and fought alone. In the fight against the third one, even though his body had suffered fatal injuries, he still did not flinch, and unswervingly guarded Tanjiro and others behind him until he died in the battle.

2. Self-discipline and firm-willed

Although Anjuro’s father was a former Yanzhu, due to family reasons, Anjuro’s father had been depressed for a long time, so he also He neglected to take care of Anjuro's brothers, let alone teach them the breathing of fire. In this case, Anjuro can only rely on himself to learn the breathing of fire. All the breathing methods he has mastered so far are all based on his own talent. Enlightenment, this incident is enough to show Anjuro's firm will and outstanding talent.

3. Accept failure calmly

In Infinite Train, because Nightmare’s method of using the vampire technique was too clever, even Yanzhu, who had experienced many battles, did not notice it. At the beginning, all members of the Demon Slayer Corps fell into a dream caused by nightmares. After waking up, Enzhu did not pretend to be reserved, but accepted his failure calmly, even if he was facing someone whose level was far lower than him. After being hit by the vampire spell, Yanzhu still reflected without any scruples.

4. Caring for the younger generations

Although Anjuro is not old, he is like a big brother, warming up every member of the Demon Slayer Squad and giving them warmth and protection. .