The Search for WondLaEdit
Rovender was a wanderer whom Eva met around the Wandering Forest. When they had been captured by the hunstman, Besteel, they helped each other in their joint escape, despite Eva speaking only English and Rovender only Orbonian, and camped out, where Rovender used a device called a "vocal transcoder" to translate one another's language, and could communicate much easier.
Rovender accompanied Eva to her (now 85% destroyed, according to its main computer) Sanctuary to retrieve Muthr, who dove into the gymnasium pool to extinguish herself. The trio traveled together and, despite their differences at first, Rovender had become accustomed to the robot caretaker, even claiming that "it should have been [him]" after the occurrence of Muthr's death by the hands of Besteel.
The two travel the rest of their journey without Muthr, until a teenager named Hailey Turner arrives in his airship, the Bijou, and "takes them back home".
Rovender is a species known as Cærulean, and carries a lantern, a curdled-milk-like drink, a wide-brimmed hat, a brown jacket (based on design, maybe an earlier form of utilitunic), and his trademark rucksack, whick he empties in the ruins of New York City after Muthr's death. He goes barefoot and has been a wanderer ever since his wife and unborn children died of a mysterious and deadly sickness.