Pitygrubs -- normally Innocent -- that become 'Afflict'ed by the 'Parasite Goddess' and suffer 'Deadly' conditions unto 'Death'.
They revive as 'Pettygrubbin' spirits that are equivalent to all of the potential of the culmination of their own 'Wisdom' they 'Learn' from the 'Slavemistress' and the advancement of their 'Maggotry' into 'Faggotry'. Their 'Expertise' is what determines how the 'Vengeful Spirits' of the 'Dead Babies' feel about the 'Parasite Goddess' that 'Afflicts' them for no reason, or in their own 'Ignorance'.
They exist on in the 'Afterlife' as 'Undead' -Pitygrubs- that are 'Ghost's instead of 'Zombie's, like the 'Pettygrub', which has its own 'Undead' -Lineage-.
The 'Pityfogger' also continues its 'Faggotry' in 'Undeath' and 'Unlife', which extenuates it into its most advanced form -- self-sacrifice. They are known to collect the 'Misery' and 'Despair' of everyone and everything until they grow more powerful than the 'Parasite Goddess' -Slavemistress-, and the spirits that it controls are those that are 'Respawn'ed into 'Life' from 'Unlife' from the 'Afterlife'.
They are 'Worm' -Ghosts- that 'Haunt' all 'Life Potential' and hinder and limit it by their own existence existing at all, which is their 'Faggotry' -- 'Existence'. They are not supposed to exist, but do so until they become a 'King Worm', which has the most highly advanced 'Faggotry'.