Tatsuya (龍也) is character in Wangan Midnight, appears only in manga and WMMT 'Monster Machine arc'.
An old friend of Keiichiro Aizawa who also works at the host club alongside him. His name is not to be confused with the driver of the Blackbird, Tatsuya Shima, as the kanji in their names are different.
He does not appears in anime for unknown reason.