Name: Dr. Albert Gender: Male Personality: Grumpy, conservative He creates brilliant but somehow flawed inventions. He is very authoritative, so Maca and Roni are afraid of him, but in reality, Dr. Albert is the one who ends up suffering every time!

Name: Maca Gender: Female Birthday: May 11th Personality: Timid, charming, pure A timid troublemaker! She worries a lot about safety and is afraid of Dr. Albert. She always tries to clean up the messes Roni makes, but things only ever get worse. She is Dr. Albert's assistant.

Name: Roni Gender: Male Birthday: May 12th Personality: Shameless, pure A shameless troublemaker! Whenever Dr. Albert disappears, he fearlessly touches the inventions, but he's lucky enough not to get caught. He loves assembling Gundam models.