Alex David Grace remarks (in commenting on my original comment) that Mucor is still creepy in Blue.
To clarify, my original remark was intended to refer to the way in which in the course of Long Sun Mucor becomes treated familiarly. In particular, by the time Maytera Rose is calling he "my granddaughter" the whole thing seems very cutesy to me. Not at all the frightening demon who has to be exorcised from Orchid's.
-- Dan Rabin
*This is WHORL, for discussion of Gene Wolfe's Book of the Long Sun.