We need a Fluffy and Bubble tag team now.
I have a few theory’s one including that the flagship monster could be like Atoral Ka except with rocks. The flagship monster can control rocks surrounding it to form a armor like coating (think Rajang but instead of just it’s arms it can be any body part) then after chasing it throughout the story you royally piss it off and it forms its big armor thing.
Another one is that both monsters are related. Think the Seltas’s but probably not as rood as that queen is. Maybe they share some kind of bond and when you kill the first the other comes out like “My brother what have you done?!”
I dunno is just a theory, a GAME THEORY THANK’S FOR READING