If a suspicious guy comes, she is to help Aisha send them away.
With this, the security of my home is perfect.
I had her protect the house, at least until the guardian magical beast is summoned.
Since Eris came along, it should be fine to take Sylphy and Roxy along as well...
But due to Orsted's curse, they will most likely become hostile towards him.
In the end, going alone was better.