Aegon Targaryen
King of the Andals, the Rhoynar, and the First Men
Directly and indirectly?
Under Oro's tutelage, Sasuke became a Genjutsu powerhouse when he never used Genjutsu at all in his fights. He also became a skilled swordsman and continued to blossom in terms of Ninjutsu, even mastering shape manipulation and combining it with nature manipulation, as well as snake summons, and so on. Even in BoS, Sasuke is shown asking Oro for help learning new techniques.
I don't remember how much of a hand Oro had in Sasuke mastering Kirin.
Under Oro's tutelage, Sasuke became a Genjutsu powerhouse when he never used Genjutsu at all in his fights. He also became a skilled swordsman and continued to blossom in terms of Ninjutsu, even mastering shape manipulation and combining it with nature manipulation, as well as snake summons, and so on. Even in BoS, Sasuke is shown asking Oro for help learning new techniques.
I don't remember how much of a hand Oro had in Sasuke mastering Kirin.