What can she do when no one else will do for her life?
There are ghost stories of nymphs being lonely for hundreds of years and when they find a hot human hunk, they kill for him, disobeying any instructions and violating any rules or policies from their masters.
If you look at them, you can tell they are made for each other, duplicates of each other.
But for the Japanese royal family, there are different obligations for a princess.