Ojama Blue is one of the 5 Ojama brothers that serve as spirit partners to Sasuke Uchiha. Ojama Blue was used as bait by the Phantom Virus to lure Sasuke to him, which proved to be his downfall. Sasuke kept the Ojamas in his deck after this incident. Ojama Blue is later drained by the Sacred Beasts during the final duel with Nightshroud, but he is restored afterwards. In Season 19, Ojama Blue begs Sasuke not to betray his friends. Ojama Blue is later killed with the other Ojamas, except Ojama Yellow. Ojama Blue is revived at the end of Season 19.
Ojama Blue is calm and collected, whereas Ojama Red is wild and rambunctious.