As to why that split persona is possible, it's again because rinny loves us so much that they don't want to be apart from us, so I bet the queen increased rinny's yandere-ness and the queen turned back rinny when all things are done
If it's either a boost or a true split personality, then Its 50/50. The part where she truly wants us is not a fake one but she also doesn't want us to get hurt so... Yeah. 👍
