It takes the better part of half an hour to make it, between dodging security patrols and some of the escaped creatures. And what Alice will see, even more than usual, is just how little sound Guri makes, when she wants to. Her movements around the train are practically clomping by comparison.

When she needs to, she moves with speed far greater than that of a human, making use of every cover and shadow, motioning Alice forward.

Finally, she shoulders open the door to a building.

"Up the stairs," she says, "first door on the left."

What's up there is an apartment that, generously, would have been termed a 'rat trap' - the living room is open to the air now, half a wall gone. But there's a bedroom, and it's intact. And warm enough when burrowed beneath blankets.

"When you awake," she says, gesturing towards the room, "I will venture out for some water and what food I can find."