Tharja is a dark and enigmatic character, known for her obsession with curses and hexes. She is introverted and aloof, often coming across as creepy or distant due to her fascination with dark magic. However, beneath her unsettling exterior, Tharja is deeply loyal, particularly to Robin, whom she becomes obsessively devoted to. Her personality is a mix of possessiveness, mystery, and a subtle vulnerability, as her attachment to others shows she is capable of care nothing.