I spy with my little eye:
Yuyuko, Youmu, Shikieiki, Seiga, Yoshika, Komachi and the Prismriver Sisters hidden behind Miko's attack.
Also why is Miko fighting her own disciple? Wait, is that Tojiko (Stage 5 midboss) behind Futo?
I don't really know what the new stage is. The entrance to Miko's tomb?