Church Keeper

The Church Keeper is a character in Hollow Knight: Silksong. They appear to be carrying a large woodwind instrument.

Silksong
Hornet meets the Church Keep just as she makes it out of the Moss Grotto from the Old Church and collapses. They act as a mentor of sorts throughout her journey in Pharloom. In the trailer, they are seen singing while Hornet plays her Needle.

In the Moss Grotto demo, they witness Hornet falling unconscious on the ground and start laughing, right before the end of the demo.