
I think that, since seeing that mistreating her sister would cause her to be mistreated, Vio-chan should just ignore her sister. Ignore the prince. Be friends with Yulan and do her best to not be involved with any of them.
And if with Yulan it doesn't work either, she should just become a Nun.
The men in this manga and even women too (Besides Vio and Yulan) are pieces of trash anyway
It's nice and dandy that they are all doing fine, but I want to know about Pariya!