My absolutely ideotic theory after reading 3.0 story

In trailers we saw elysia, we know that in trailers is her "npc" form, we know that march is going to get a new form.

When we arrive to amphoreus march stars to feel sick. At the end of the story we see that elysia is dead and right after that we see that march is covering into six-phase ice.

What i think is that march will become elysia in 3.1-3.3