Does Orochi know Haise Sasaki?
You will get your answer in the anime Tokyo ghoul :re (episode 2)



Dialogs from Orochi 


   No matter how far you go, you're always irredeemable, huh... Kaneki?


Haise replies 


   Nishio.... Senpai.. ? (Haise loses control here since he starts getting flashbacks from his lost memories)