Olivier Gaillard is a major antagonist in Season 4 and one of the four Quatre Knights. He's the European Circuit Champion and played a key role in fighting back against Link Joker's spread. His Vanguard Circle is dark blue.
Olivier is pretty obsessed with the idea that he's inherited Aichi's will, and he's made it clear he'll go to extreme lengths to keep anyone from getting in the way of that mission. Fans often note his intense loyalty to this cause, though his methods and motivations remain central to his character's arc.
Content compiled by AnimeList.moe from publicly available sources.
