[ she can't help but feel a rush of enthusiasm after reading his message, her heart swelling in her chest.
it was no secret that the path of a hero, or demon slayer, was a lonely and dangerous one.
mitsuri feels an immediate respect for such a young boy being so determined to do the right thing. ]

You're right. Everyone can be a hero, if they only want to!
I definitely believe that there are good things each one of us are capable of, and
I'm glad that you're trying despite whatever circumstances you have.
I really hope that you can continue to reach your goal, Tsukuyomi-san!

[ she isn't sure what to make of the 'aligned with darkness' thing. ]

We've talked about a lot of things so I'm not sure if I gave you my name earlier!
But please know that Kanroji Mitsuri is rooting for you!