Ninja themed build
Other notes:
This build is more themed to reference the lone shadow ninjas from sekiro.
I used the gold hemmed black hood as I like it more and sort of fit the hoods they wear better.
You can replace the ring of fog for the slumbering dragon crest ring (for silent ninja footsteps) or the ring of favor and protection (to wear heavier gauntlets like the silver/ black knight gauntlets or gauntlets of artorias).
If you don't want to use the ring of fog or the slumbering dragoncrest ring you can add a few attunement slots to add the hush or hidden body sorceries if you still want to create the ninja stealth feel.
Any katana will do.