[zibi88]

Spoiler for hmm:

Still there is a possibility that now Elka Maria will do something inside the nova to either disrupt the nova power and let the team lend a solid hit on it.

Maria till now was living in the mindset that what she does is for the balance, but Kazuya explained to her that its not the case and Maria changed her mind set and wants to save Elka by saving Earth.

there is a posibility that the nova on earth is actualy the sisters united which came from Elka to destroy Earth and get rid of the threat once and for all. While the girls on elka try to find a way to get back.

Its possible that Maria Lancelot is Maria Elka... like sisters combined and went to Earth, on the way there Maria does something to split herself off them in the transcendental path and adidtionally slower the sisters down so they arrive years later. So Maria Elka appears on Earth but taked on her name Lancelot (which she learned from Kazuya) and started to prepare the world for the sisters arrivial.

Still Kazuya is slowly starting to addapt to his nova self so maybe when he meets his grandmother Maria he can actualy give her a warm hug. The same accept his family and get closer to Arcardia his half-sister since she is the reason his body is even in this world.