Amada Mansun (アマダ・マンサン)is a fictional character from the novel Mobile Suit Gundam: Hathaway's Flash. He is a professor majored in botany, and Hathaways was supposed to be his assistant on his research.
Hathaway Noa gave Gigi Prof. Mansun's number, telling her that if she needs to meet him, this is the number to call. When Gigi called him, the professor said that he can't get Hathway right away since he's out somewhere observing plants. Gigi then told him that she wants to see Hathaway at Adelaide.