He first appeared when Aichi was submitting his entry application form, Osamu places his application at nearly the same time as Aichi. Both of them wanted to enter, but there was only one open spot left in the tournament. To resolve this issue, Shin Nitta recommended to have Aichi and Osamu play against each other to see who gets the last entry spot. Using his Megacolony units' effects, Osamu restricted Aichi's units from standing while scoffing at him for calling so many weak units. However, Aichi used his new card King of Knights, Alfred, whose power was increased by the number of other Royal Paladins in play. With Alfred, Aichi defeated Osamu and was therefore officially in the tournament.