Riyan

Riyan is a member of the Dark Ones who appears to be wearing a pair of rocket packs on his back. He first appears when he, along with the rest of the Dark Ones (except for Ganryū) attempt to capture Senna, but retreat as soon as Ichigo Kurosaki arrives. Later, the Dark Ones ambush the Shinigami sent to retrieve the Memory Rosary, which begins with with Riyan firing his rockets. They all retreat as soon as Ganryū successfully captures Senna. Later, when Ichigo breaks into the Valley of Screams he, along with the rest of the Dark Ones, attempt to stop him, but are interrupted when the Shinigami arrive to back Ichigo up. He engages Tōshirō Hitsugaya in battle, keeping him on the run and even seemingly pins him down, but the tables are turned as soon as Hitsugaya releases his bankai. Hitsugaya then immediately kills him.