Cassandra the Dust Eater - ISTJ
“Its lack of discernment, which is necessary in the final moments ... is the great wall that will sap number one and number two”
Introverted Sensing(dominant, SI): Cassandra has strong beliefs from experiences she has passed through, this makes her especially connected to memories and people who have gone through her history. Her "dust-eating" ability (name given by Roxanne) is her source of shame, as she "remembers the frightened faces of her companions at seeing this distorted technique", this belief is strong enough that Roxanne, an extroverted feeling, could not have that kind of openness with Cassandra since SI has an expectation that the reactions will be the same as the previous ones. It is with this expectation that she already had Roxanne that she went to certify that the incident with her friend was a perverse attitude, since she herself had already felt it on her skin.
Extroverted Thinking(auxiliary, TE): Because she is a recluse before awakened, little is exposed of her, including her TE. Cassandra demonstrates her TE in two moments, when some of her colleagues were ambushed and she immediately knew what measures were needed, that unless she went into battle they would all die, and the second was when her friend died and she knew it would not be possible happen unless they were colluding with the situation. After awakening Cassandra demonstrates her personality in a more open way, something that her rival did not expect nor knew how to deal with. She is quick to understand how Roxanne's awakened form works as well as her abilities, creating an efficient strategy to take advantage of all of her weaknesses, and has had the patience and control so that Roxanne is literally helpless.
Introverted Feeling(tertiary, FI): Cassandra has feelings only for her and rarely can she demonstrate, despite being so intense, she spent a lot of her life in a SI-FI loop, fearing SI's expectations and how she feels if they discover her technique. At a certain moment she created a very strong friendship with a warrior, the only one who knew her technique and was not scared, Cassandra valued her friend and that was her weakness, in the midst of the fury she attacked all the organization's warriors at the same time without think while she was injured until she reached Roxanne who took advantage of her injuries to kill her.
Extroverted Intuition(inferior, NE): Because Cassandra is always with an already defined expectation, she cannot see other paths, other intentions. This is visible when she is surprised that her friend is not scared by her technique or Roxanne's intention, this lack of openness in her expectations (SI) blinded her to dangerous (NE) possibilities around her.