Thinking about it, it's actually kinda funny how incompetent Halsin is. Dude's fought Sharites, is the archdruid, and yet never even says a word about Shadowheart. Narratively speaking having him be suspicious, recognize her apparel, would have been a neat way to tie the whole thing together, give answers to all those players who'd failed the checks on her even. But nope, he's just oblivious.

Kagha and her shadow druids likely held their voodoo rituals in my man's bedroom, he just never noticed.