I reckon Shawl sounds like he could be Undone. He's specifically into wood carving and Undone carves faces into his victims. Plus the wooden stakes make more sense here than with Casha.

It would be cool to figure out the others before doing the ritual. xD Nth still interests me. Killing by cremation could be done by electricity... There are a few possibilities if we figure Nth = white fur. Dari looks kinda likely due to the numbers thing but there are a bunch we haven't interviewed. Maybe an electric type should try interviewing Saps the Pachirisu? :O

Nice work everyone! :O