It's been a while since he found her all alone and made her his Acolyte.

He sensed a darkness in her, a potential that asked her to use it.

Her Master once told her:

"An Acolyte… An Acolyte Kills Without A Weapon. An Acolyte Kills The Dream."

She wanted him to be proud of her, but... he required her to kill a Jedi without using any weapons.

She weren't ready for this yet, despite her efforts and preparations.

But he waited patiently... even though it was difficult.

He never told her his name or showed his face. He always wore this mask that covered his face, changed his voice and made him quite intimidating. Combined with the robe, which was long but exposed his muscular arms...

Oh well.