cell er ▁( A ▁C ertain ▁Mag ical ▁Index ) ▁– ▁doctor ▁and ▁medical ▁scient ist ▁ ▁Doctor ▁Hog back ▁( One ▁Pie ce ) ▁– ▁doctor ▁of ▁Ge cko ▁Mor ia ' s ▁crew ▁who ▁modified ▁dead ▁bodies ▁to ▁create ▁a ▁z omb ie ▁army ▁with ▁the ▁help ▁of ▁his ▁captain ▁ ▁Ri ▁Koh ran ▁( S ak ura ▁Wars ) ▁ ▁Jonathan ▁Jo est ar ▁( Jo Jo ' s ▁B izar re ▁Advent ure ) ▁– ▁arch ae ologist ▁▁ ▁Har umi ▁Ki y ama ▁( A ▁C ertain ▁Scient ific ▁Rail gun ) ▁– ▁cre ator ▁of ▁the ▁Level ▁Upper ▁Son ▁G oh an ▁( Drag on ▁Ball ▁), ▁not ▁properly ▁a ▁scient ist , ▁but ▁an ▁estimated ▁university ▁professor ▁ ▁May uri ▁K uro ts uch i ▁( B le ach ) ▁– ▁head ▁of ▁the ▁Shin ig ami ▁Research ▁Institute ; ▁performs ▁extensive ▁bod ily ▁modifications ▁on ▁himself ▁and ▁his ▁sub ordinates ▁ ▁Dr . ▁Emil ▁Lang ▁( Rob ote ch ) ▁– ▁responsible ▁for ▁much ▁of ▁the ▁Earth - based ▁Rob ote chn ology ; ▁briefly ▁seen ▁in ▁the ▁original ▁series , ▁he ▁played ▁a ▁much ▁larger ▁role ▁in ▁the ▁ab orted ▁series ▁Rob ote ch ▁II : ▁The ▁S entin els , ▁which ▁was ▁adapted ▁as ▁a ▁com ic ▁book ▁series ▁ ▁Professor ▁O chan om iz u ▁– ▁sur rog ate ▁father ▁of ▁Os am u ▁Te zu ka ' s ▁Ast ro ▁Boy ▁ ▁O ro ch im aru ▁( N ar uto