@Isekaijin Its more than that... officially shes a maid and guard under a royal house (even if she is a sanctioned guard/assasin at that) however blatantly just killing a very high ranking noble wouldnt just get mc killed... it would completely sanction the house mc is serving for on the surface would be an unprovoked attack on an "innocent" nible. You cant cover up whats done in the middle of the day.
They need evidence first or at the very least permission to target that guy as corrupt for a sanctioned hit. There is no way her memories from another "lifetime" can be counted as evidence.