Here's a bit of info about her:
Lethra is a brilliant prodigy and field medic whose intellect far exceeds normal standards. While she is highly talkative, she lacks the ability to relate to others in a conventional way, often making inappropriate or "creepy" remarks that walk a fine line between grotesque and comical. This social disconnect is most evident in her obsession with Kyria’s synthetic body, whom she frequently treats more like a laboratory specimen than a person, often asking intrusive questions about "opening her chest" for examination.
Beneath her eccentric and sometimes frightening exterior lies a history of immense resilience and self-reliance. Born without arms and with malformed organs to a sick mother and an absent father, she spent her childhood using her feet to build her first prosthetic limbs from scrap parts. The death of her mother, whom she was too young to save, fueled her intense dedication to medicine. Her medical expertise is a matter of survival, as she must be capable of operating on her own failing internal systems.
In social and combat situations, she carries the energy of a "mad surgeon". While she occasionally shows a genuine desire for friendship, her unpredictable nature and medical fixation make her a character that most people find unsettling to deal with.