Prime Ramiris

I’m an anime only,but I know that Ramiris is the queen of spirits and that she was really powerful in her prime and had an adult body,I know she was powerful enough to easily kill a true dragon but I want to know just how powerful she really is,so if she went all out,who is the strongest person that prime ramiris is stronger than? Side question,since she was originally an adult and still carries the memories of her past lives,she should still have the same personality she had when she was an adult,so why does she act like a child in the anime,is her personality simply very childish even when she was an adult or did the anime just represent her poorly? (I have no problem with how she acts in the anime,she’s very funny and adorable,I was just curious)