Skuld

Skuld is one of the NPCs part of «The Holy Sword of the Ice Palace» quest. Skuld was created by the Cardinal System’s Automated Quest Generation function, which based the character on a myth from Norse mythology. Unlike most quest NPCs, Skuld's core programming is connected to the language engine module, therefore, instead of having a fixed response routine, she has a certain level of Artificial Intelligence and is thus capable of much more flexibility in her dialogue routines as well as sounding far more realistic than a regular NPC. (Source: Sword Art Online Wikia)