"Wherever you go, we will always be together," They thought they would have died back then when the demon attacked them. They thought they wouldn't live to see the next sunlight. Only for a demon slayer who was turned into a demon from young, came to their rescue. With Amane convincing them to return to the Demon Slayer Corps with them, did they find out about the demon's past. How she was a young girl, close to their age as well. And how she became an important part of their lives. Wherever they go, they were sure to bring her along.