Knight Antonius is a vendor that runs the shop known as Antonius's Armor Reserve at Topple Town, near the Graveyard section of the sanctuary and the airship owned by Captain Finnegan. Knight Antonius sells a variety of armor sets that players can purchase from, each giving different stats and armor values. These armor sets include but are not limited to:
Implied by his name, Knight Antonius is clearly a knight, preferably a knight from the medieval era. The name Antonius could derive from the meaning of 'worthy of praise; value'. This could apply to how players can purchase a variety of armor sets that can benefit them in their adventures, as well as having values depending on the armor set that the player had chosen.
- This may be a possible reference to Knight Artorias, a DLC boss in Dark Souls: Remastered.