Pure -
Zuiver
Tahir

Holy-
Sanctus
Archard

Torment-
Crucio
Kutsu

Liking Kutsu. :3 If I don't get anymore name suggestions by the end of the day I'll go with that :3

I could try and think of some names if you still need one.

Still do :3 Not the end of the day yet lol

Lol true. Okay I'll look around for ya.

Ok Cool Thanks sis!

Oop. I forgot to mention Kiyoshi and Kada. That means pure.
An Seiko means holy.

If your character uses light or holy powers to punish evil souls, then I think the kind of name you want should mean something more like "justice" and refer to something divine.

Since your character is male, the closest male name I could find that means something like that is "Rashnu", which refers to a Zoroastrian angel of justice.