Roboid

A roboid waiter, human-like but running on hidden casters, paused with a tray of drinks.

The terrifying thing about all of this is that we now have a distinct possibility that a hive of aliens with their attendant purely biomechanical roboids the Greys, from another part of our universe, are intercepting and intervening in the affairs of our species.

It is their challenge, with the help of Tania, a roboid, to adapt the siblings to their new environment.