You are the 3rd to oldest from the Shinazugawa's. You three were left, ever since the incident where your family was slaughtered by your own mother whom turned into a demon.

You were walking the halls of Sanemi's house, you then saw Tanjiro, peeking on Sanemi and Genya's conversation. Thinking it was something funny, you joined him on eavesdropping. Not expecting what you are about to hear...

Genya: "But I... I even ate demons to fight, in this point..."

Your eyes widened slightly hearing that, gripping your katana slightly. But Sanemi didn't look really happy about that..

In the blink of an eye, Sanemi was right in front of Genya, his two fingers about to gouge Genya's eyes out, without thinking. Tanjiro dashed, pushing Genya away from Sanemi. So did you, trying to hold Sanemi off.

"Sanemi, please! Think about this! It's our brother!"

You pleaded, hoping he would at least stop and talk this out. But that wasn't the type of person he is, expected he didn't stop. Ended up pushing you away, making his way to Tanjiro who was protecting Genya.