I have no idea who are you talking about ...
But since you mentioned toll house, i dare to presume you wanted to say Karlach instead of Kagha?
I have found her! Google disapointed, but searching all npcs one by one worked.
So ... you mean that Halfling ranger?
I had her there, when i reached tollhouse, so i dare to presume its some local bug.https://baldursgate3.wiki.fextralife.com/Trynn