Fran is way too adorable for my heart.
Not only is the story adorable but it's actually pretty good, Fran doesn't just abuse the sword's power and actually thrive to better herself and her own skills to the point of injuring herself.
Nothing permanent obviously.
Hell, the sword isn't even that op compared to the thing they are fighting, the boss fights seems fair and hard.
Fran is too good, such a determined character has no right to be this adorable.