*Yubel is silent for a moment, before she bends down to take a closer look at the marks herself, tracing a clawed finger over them.*

I would say that if what he is doing is setting off only the signer marks, and is in no way being detected by anyone else in the city with a heightened sensitivity to supernatural occurrences, then these marks he is using could be related to those marks.

*She points a clawed finger at Kou's arm where his signer mark is.*