>>280788494The brown girl Fuki features more prominently in the second movie, this was just an introduction for her.
I don't know about the blonde guy, I've read he is a priest of the water goddess, but it's a bit funny he had to be warned not to light a fire.
Asa and Kame are just two girls that happened to enter Ooku on the same day. Kame btw can mean "earthen jug that holds water", but also "turtle". Asa means "morning".
Their relationship mimics Kitagawa's situation with her unnamed friend. The reason part of the movie is a bit muddled with all the artistic choices, but I think the message is to not throw away your friends (or generally anything that makes you happy) and become a heartless bitch, because very soon you will suffer from burnout syndrome, with no one to hold your back.
Asa did send Kame home in the end, but the combs mean they will still stay friends and keep in touch.