The main characters were designed by Takehiko Inoue, a noted manga artist who had developed a reputation for designing "people". Inoue made the initial character designs based on the material provided by Sakaguchi, then submitted them and adjusted them based on Sakaguchi's feedback. Characters sometimes needed to be completely redesigned, such as Tolten. The main characters' clothing was designed by "Final Fantasy" artist Hideo Minaba: the clothing was designed not to reflect any nationality or historical era. While they tried not to limit the designers' creative abilities within the game's hardware, Minaba was asked to limit fluffy or swinging clothing. The character models were hard to create, especially considering the surrounding environments. In contrast, the use of Unreal Engine 3 lessened the technical restrictions on the team. Inoue ran frequent checks on the character models as they went through multiple revisions, even down to their eyebrows. It was estimated that three hundred unique characters were created for the game. The game's concept artwork was worked on by Christian Lorenz Scheurer, who had previous worked on "Final Fantasy IX", along with film projects such as "The Fifth Element".