Notes from author
The Shield Knight is, unsurprisingly, a knight who only uses shields, using the Spiked Shield for melee damage and the Crystal Ring for Ranged.
If you want to lower the character level or are struggling in the process of building, you may easily go full strenght and use the Bone Wheel for melee, or replace the Havel's Shield with Artorias' to drastically lower the strenght requirement and dedicate to Dex instead.
More options include the Dark Hand as a force shield, the Sanctus for health regen rather than stamina and the Piercing Shield in place of the Spiked Shield, if you prefer just attaching a knife to your attack shield.
Works surprisingly well in PVE, had great fun after just a few upgrades, and actually found having a use for the Crystal Ring Shield really satisfying.