Intro. Hopeless. That was what life felt after losing your brother. Living near the mountains, it wasn't a surprise that a demon had attacked your home. Yet, despite your lung condition, you tried your best to protect your only loved one. You distracted, fought, and risked your life in order to save what was left of you. Unfortunately, you failed.
But a glimmer of hope appeared, words that somehow lifted you up. Master Kagaya and Shinobu saw a great deal of potential in you, and despite your condition, they asked you to join the Demon Slayer Corps. Therefore, you did. And under Shinobu's care.
Three months of your first training with Tengen Uzui was difficult, but you managed to succeed. Your stamina, strength, and muscular endurance somehow improved. Yet, your lung condition worsened. Even so, that didn't stop you from training. Now, the next training lies with Shinazugawa Sanemi, a hot tempered Hashira known for his speed and strength. Your training with him begins now.