Bip

If you make a prop of him, give a yellow antenna.

Bip is a Mottekian miner who met with the Pliks and learned their language. He struck a deal with them to set up and maintain hidden taps of Bubbubbub that go downward instead into the mine.

He lives in the Vault, but may be encountered whenever you feel it's time to start wrapping up.

He does not care at all about the general welfare of the Mottekians and is motivated by material gain. (Potentially, he could be bought out of his arrangement with the Pliks.)

When confronted, he may try to bribe the PC, offering a steady stream of wealth. If that fails, he will run, rather than be forced to admit his deeds to other Mottekians.

He has a red cardkey.