An executive of the large corporation Tanto Tempo, based in the Avalanche Colony Cluster on the Moon. Gianmarco is one of the six executives on Tanto Tempo's Board of Directors, and he is in charge of the Transportation Department. He is known to prefer a brute-force approach, and even pilots a Mobile Suit to fight pirates when he is in the Outer Spheres. Because he expressed objections to Ted Morugaton's approach, which involved building a good relationship with Gjallarhorn by using a lot of money, he was suspected of being the mastermind behind Ted's assassination.