List of The Underland Chronicles characters

In general, they have darker skin and hair than Underlanders, and their eyes range from blue to brown.

[1] Underlanders are humans descended from a group of 800+ Overlanders brought underground by Bartholomew of Sandwich.

Like Overworld bats, they possess large ears which help them navigate and communicate, but their eyes are much more developed than those of their smaller cousins.

The rats' traditional territory in the Underland includes the Dead Land and Firelands, both low on food and safety.

Mice are good fighters, but often choose not to resist the rats' moves against them because they perceive such attempts as pointlessly dangerous.

They "speak" by rubbing their legs over their chests to produce a humming sound; like cricket chirps, but with deeper and more varied pitches.

They have a low tolerance for noise and useless chatter (which they associate with political discussion), but they are never openly hostile towards other creatures.

In Gregor and the Code of Claw, the spiders use their semi-neutral status to their advantage by aiding both sides of the war between the humans and gnawers, and thus endearing themselves to whoever might win.

They eventually choose to fight with their longtime trading partners the humans, and against the rats who attacked them during Gregor the Overlander.