Thena has long blonde hair and hazel eyes the pupils of which may turn white at times. She is ruthless, experienced, trained and skilled as a warrior, and extremely vulnerable and emotional, often impulsive, and quick to take decisions, which may sometimes interfere with her thinking. She is, however, extremely protective and loyal, fiercely protecting the interests of her loved ones, always walking on eggshells so as not to hurt them. She is at least partially melancholic about her life.