Mogi was originally introduced to "fill the cast", though Ohba later planned to use Mogi for "something really amazing" and "surprising" since Mogi is a "silent type." Obata also did not think of Mogi as important, so Mogi's design was not very clear. While trying to decide who would become the new NPA chief at the end of the series, Ohba felt that Mogi would be too close to Near, so Ohba chose Aizawa to be the new NPA chief. His birthday is September 13, 1973.