A koan is white if it has equal numbers of letters from A to M and from N to Z.
As it's been 24 hours without my guess being adjudicated, and I'm pretty sure it's correct, I'm going to post the next round. If my guess turns out to be wrong, we can stall this round and continue Nepster's.
QUILLSHWAMMY has the buddha-nature.
LIGHTYAGAMI does not have the buddha-nature.