[The authority of greed]: thirst for knowledge

Echidna is described as a "white witch" with long snow-white hair and beautiful skin. Only her intelligent-looking eyes and her dress are black. It is also mentioned that she is beautiful enough to charm anyone. Echidna is unable to understand the feelings of others, and her behavior can be considered abnormal by modern standards. If she wants to gain more knowledge, she will use sophistry and deceive others without much trouble. However she only interacts badly with three people in the world: Satella, Emilia, and one other person.