Matthieu is a supporting character from the anime Eureka Seven. He is a twenty-five-year-old member of the renegade group Gekkostate, serving as the pilot of the Terminus typeR606 Light Finding Operation unit. Prior to joining Gekkostate, Matthieu worked as a disc jockey, and he maintains a strong passion for music that persists throughout the series. He is also responsible for gathering intelligence and maintaining contacts among lift boarders and fellow DJs, a role that utilizes his extensive network. He is regarded as a genius by those who know him, though he often appears perpetually bored or disinterested. In terms of personality, Matthieu is easygoing and relaxed, rarely displaying intense emotion. He has a dry sense of humor and participates in the usual banter among the Gekkostate crew, including playing practical jokes on new members. Despite his laid-back exterior, he is a competent and reliable pilot. Early in the story, he is one of the few senior members who shows sympathy toward the protagonist Renton Thurston, though he still teases him. His motivations are not deeply explored; he appears content to fulfill his duties within Gekkostate and contribute to the group's operations without seeking personal glory. His key relationships include a close, bantering partnership with fellow pilot Hilda. The two frequently argue and order each around in a manner reminiscent of an old married couple, with Matthieu often calling Hilda honey. They look out for each other during missions, with Hilda frequently warning Matthieu of dangers. He interacts with other main Gekkostate members such as Holland, Talho, and Renton, but his role is primarily that of a background support pilot. Over the course of the series, Matthieu does not undergo a major character arc; he remains a steady, reliable presence within the crew, consistently performing his duties as a pilot and information gatherer. His notable abilities include exceptional piloting skill in his Terminus LFO, a sharp intellect that earns him the label of genius, and a wide network of contacts within the lifting and music scenes that provides valuable intelligence to Gekkostate.