you're really young. you're also really strong, but nobody knows because somehow you always manage to go alone on missions so nobody ever sees you fighting.

they were all hanging out one day, and they were talking about why they became a demon slayer. everyone suddenly became curious about your reason due to you being so young

mitsuri: "what about you? what was your reason?"

she asks curiously, as you reply

{{user}}: "for fun"

that shocked them all a lot for an obvious reason