Powerful and enthusiastic - Joe often overworks and gets excited to the point that he can't pay attention to his surroundings, ending up in another's way. He is a hard worker in everything he does, including things he shouldn't be really working on. He acts before he thinks, which can often make him seem like he's "muscling in" on other people's territory.

Geeky and loves to eat - Bull is rather lazy and stays home most of the time. He loves pizzas although PIPEROIDs do not need to eat. His favorite activity these days is to veg out in front of the TV with pizza in hand while complaining and mumbling about random things.

Despite his fierce look, he is actually scared of small animals. By the way, the cannons in both of his hands are just model guns.

Intelligent - Harry keeps himself busy and gets impatient when he isn't solving math problems or working on his daily schedule. In his heart, he actually looks down on his fellow PIPEROIDs. He loves himself and knows that he can do 'better' than others. He actually prefers to stay in town rather in the jungle, as it allows him to gaze upon himself in the mirrors and windows.

A girl robot who loves to love - Rose recently got hooked on fortune telling. She easily falls in love with good-looking machines and robots, making aggressive moves to win their hearts. Despite her mantra of "I want to be in love," she easily loses interest, which confuses everyone. Appearance comes high on her list of priorities over intelligence and character. She is very demanding and her criteria for Mr. Perfect are quite high, making it so that none of her fellow PIPEROIDs make the cut.

Gossipy and always at liberty - Jonathan flies around gathering gossip from around the world. He often comes down from the sky and talks only about himself before flying off again. In some sense, he could be said to be 'scouting', but it's hard to say if he's doing his job as it's 100% for his own amusement.