Tanjiro has shown incredible determination throughout Demon Slayer 's story. From training to master Sun Breathing to being one of the first to unlock the Demon Slayer mark, Tanjiro has grown to become a powerhouse, despite not yet reaching the level of a Hashira . However, in Demon Slayer: Infinity Castle , Tanjiro was the first to awaken the ultimate power-up.

During his fight against Akaza, while Tanjiro was analyzing the Upper Moon Three's fighting style, he suddenly recalled his father's teachings and a conversation he had with Inosuke about finding a way to conceal killing intent in battle. This resulted in an unexpected power-up that made Tanjiro one of the strongest in Demon Slayer .

Tanjiro' Transparent World is the Ultimate Power-Up in Demon Slayer

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