Dwarf engineer who drove the train to the yard and stayed aboard to detonate it in the abyss.
Tizquick was the dwarf who helped drive The Nightmare Express down to the trainyard for Carl's final plan. When Carl told Fire Brandy to take her babies and go, the dwarf exchanged a look with the demon: the two of them had already discussed it and decided to stay with the train. Tizquick told Carl not to worry — he knew how this worked, and he'd make her blow nice and big just before they hit the bottom of the pit.
His conversation with Brandy was what shook her memories of previous boilers loose. After the train vanished through the portal into The Abyss and the experience notifications came flooding in, Carl reflected that Tizquick had killed himself because his daughter had been a lie.
A grizzled dwarf engineer in a locomotive cab, grease-stained and matter-of-fact about his own death.
Engineer who volunteers to ride the bomb-train down and time the detonation.