As of Version 1.04.01, there is a glitch in which Malenia will regain health while attacking a player character that is in their long death animation. This in turn can make the fight more difficult in multiplayer if her aggro does not change from a killed player until their health bar is completely off screen.
As of Build 1.03.2, If a player is wearing the Black Knife Set outfit while attempting to use the Mimics Veil, their character model and any weapons they have equipped will be sticking outside of the object they transform into.
The sorcerous NPC character Selvius may be based on the enigmatic wizard Severus Snape from the Harry Potter franchise. Both have similar first names and Selvius speaks in a posh, judgmental, and condescending tone just as British actor Alan Rickman does frequently in his performance as Snape in the Harry Potter film series.
The description for the Blaidd's Armor accessory ends with the line "...but the cold never bothered him anyway." This line is an homage to a lyric from the song "Let It Go" from the Disney film Frozen.
The looter Patches, a recurring character in the Souls series, can be found as a secret boss fight Spoiler:near the large lake in Limgrave after following the connected river north to a small cave on the left.