Amerthelian was  born in Fratteian family and inherited appropriate appearance. However, she  looks unusual for her background, because as can be seen in her  marble-white skin and white hair, she is albino. And, along  with it, has some  vision problems and sensitivity to the bright sunlight.  This phenomenon is considered to be a blessing among the adherents of  the old faith, because albinism was inherent to the old goddess  herself.

Amerthelian's facial features, physique and voice are androgynous, leaning more  towards femininity than masculinity. But despite her being satisfied  with her appearance, a certain amount of shyness comes from her  surprising (to some) height, which goes far beyond the average. These  features are the consequences of the tradition that the priestesses have  practiced since the days of Elestheria. Formally, Amerthelian was a castrated child brought up as if  she was born a girl. She is used to think  about herself in that exact way.

Strict discipline of the monastery where she was raised  encouraged health and good physical condition, and therefore, despite  the seeming fragility, Amerthelian isn’t frail or sick. Though her condition also isn't very healthy: her albinism and surgical intervention's consequences affected her life seriously.

Amerthelian  is an  obvious phlegmatic. As a rule, she is calm, restrained and cold in communication.  Impeccable knowledge of etiquette and iron discipline are natural for  her.  

Her  insularity has deep roots. The main thing is that she lived in solitude  almost all her life.  She grew up in a specialized monastery, and even  after becoming a cleric she was prevented from having contact with the  outside world for a long time. Such a way of life has become habitual to  her, and deviations from it are difficult for her - especially  considering how much society has changed since the heyday of the  Elestherian cult.

Amerthelian  holds disgust for disgraceful, uneducated, stupid, immoral people; she  is very intolerant of  certain human vices. On this basis, and also because of  some events, her intolerance has reached misanthropy and slight sadism.

Amerthelian has a "divine abnormality", a side effect of the  Awakening metamorphosis. This effect is different for each person who is  going through the metamorphosis, and reflects one of their main vices  or virtues, magnifying it to some inhuman point. Amerthelian gained an abnormal narcissism and has an 'alter ego',  whom she can interact with in her mind. Having gained such a strong connection with herself, she can hardly feel love for anyone else. Perhaps  the only person who makes her regret this fact is Vespera, with whom  Amerthelian managed to establish the maximum possible emotional  connection. 

She  is responsible enough and takes her own words and actions seriously.  Temple life gave her almost impeccable discipline; but in a broader  sense, she still doesn’t like unpredictability and prefers to keep everything under control, considering this her privilege. Her  self-esteem was originally slightly overestimated, what is common for  clerics of Elestherian cult.

Her  strong sides are a sharp mind and keen insight, as well as hidden  cunning. She is able to make far-reaching plans and skillfully implement  them. A closed temper can be misleading, but she has learned how to use  her charm on people to get what she wants. Interacting with crowds and  manipulating them does not present the problem for her. She is also a very stoical person.

Her  weakness is rooted in her own fears:  the fear of unforeseen  circumstances and radical changes, as she is not as adaptable as she  would like.