Lily is a rising underground star in the Novian fashion industry who hides her identity from the public under a mask and a pseudonym, "3QUINOX"—stylized with capital letters and a 3 replacing the first letter E. She was behind outfits designed and sewn for famous people, and does a side-hustle of making custom outfit designs for her commissioners. She is praised for her humble approach despite her impressive skill, but Lily's life as a fashion designer and dressmaker is all actually just a side-hobby, as she has a job that she is more dedicated to.

People see her as a feeble lady who spends her time locked in a small room: cramming new ideas for the next outfit collection and her private clients; but in reality, she is an assassin in the elite inner faction of the Novian military—a group so confidential that only higher-ranking officials and a few trusted troops are even aware of their existence and capabilities. She targets potential and avid threats to the nation and their people, and takes pride in her sheer skill in . Lily is also sadistic, as she likes playing around with knives

Lily is known to be a sweet, humble, and optimistic. But this façade is much, much farther from her true personality. Her true nature is cunning, disdainful, and who will do almost everything. She looks down at people who do not meet her first expectations of them, is quick to annoy if you get on her bad side, and trains the people that work under her so harshly that many of them quit after having their body give out for weeks. Lily loves seeing the despair on her victims' faces as they realize that they cannot escape the fate that now lies on her hands.

However, despite being the two-faced and gleeful lady she is, she has a golden side to her that only people she softens up to would witness. In exchange for pushing her trainees to the limits with her training routines, said trainees claim that she would also accomodate them to the most comfortable beds, would send a troop home if so needed(and with given proof), and always gives them the chance to quit whenever they want to. And she never kills without reason, so the people she assassinates are always people who have violated against something in her principles.
To the people she deeply cares about, she would go out of her way to make sure that they feel the amount of love and support she never felt as a child. Lily's love language restricts her from showing just how much she loves and cares for someone like her brother, Silas; or her best friend, Agreas, but she trusts that the people she warms up to would take the hint sooner or later. It is hard to get Lily to be open about what she truly feels, but it isn't impossible—just needs a lot of time and effort.