Leonardo

Leonardo, affectionately called 'Leo', is Lantern's grandfather and the chief engineer of Alfheimr.

Appearance
Leo has white hair and beard, his hair in the form of what looks like dreadlocks. His beard is braided. Like Lantern, he has blue eyes.

Leo wears a tattered, red furred coat, along with a red beanie with hearts and the letter 'A'. Along with a gear-shaped pendant, he also wears glasses that have gears in them. He wears three rings, one of them - you guessed it - gear shaped. He also has a tool belt around his hip.

He seems to be mimicking Nene - and inadvertently the Polar Bear Tribe's - habit of wearing barely enough as he doesn't wear anything under the red coat, even though Alfheimr's freezing.

Personality
Leo takes things at his own pace, but seems to be in 'hip-hop mode' when he's in a good mood. At any mention of the ornithopter, however, he takes off his glasses and becomes serious. He is adamant about flight being 'a fantasy', telling Lantern to not be 'a fool like [his] dad'.

However, it is later revealed that he used to dream about flight himself, but gave it up either due to constant, disheartening failure, or when his son died possibly to flight experimentation. His attempts to stop Lantern was out of love and concern, as well as the fear of losing his last blood relative and family. It is also revealed that he wasn't always an 'apostle of hip-hop', as Lantern puts it, and has an acoustic guitar in his secret room.

Abilities
As the chief engineer of Alfheimr, he has impeccable sense with anything to do with machines. He was able to correctly identify not only the exact pipe that was used to hit the boiler's pipes, but also the object used to hit it. He is also able to work quickly as well as accurately.