[holyman282]

Originally Posted by Kyuuen

Q1: Is she his real sister?
Q2: I remember that he legs were turned to stone (by the demon that attacked the village), yet she appears normal when she appears in the present. Was it explained?

Spoiler for Q1:

No she's his cousin, who took on a sisterly role

Spoiler for Q2:

I think she's using some sort of magic, her legs are still missing but i think it's some sort of magical artificial leg? Need to confirm..