When Genjimaru escapes with Sakuya and intends to give her to Hakuro (as a hostage in exchange for Hakuro's trust and help stopping Kuuya), it's revealed that before the escape Genjimaru had cut the tendons on Sakuya's legs so she couldn't walk, thus being unable to escape Hakuro and being the perfect hostage for him.
The final scene shows Sakuya and the still regressed Kuuya outside. However, no scene has shown Sakuya having walked at all after she is left with Hakuro. This final scene and the scenes with only Sakuya and Kuuya show only the two of them and no third person who could have carried Sakuya.
So I am wondering if Sakuya ended up being healed at some point, or if Kuuya was carrying her all this time.