Birthday: April 7, 1975
Johan's twin sister and the sole survivor of the night when both her parents and her brother were shot during what seemed to be a failed burglary. Initially, she exhibited signs of amnesia due to the psychological trauma from the incident. After she and her brother vanished, she was adopted by the Fortner family from Heidelberg, who were unaware of her true identity as Anna Liebert. Living as Nina Fortner, she became a diligent law student at an unnamed university (likely the University of Heidelberg) and was also skilled in Aikido. Her life remained peaceful until Johan reached out to her on her twentieth birthday. She then begins to pursue Johan, though her methods and reasons differ from Tenma's.
Note: "Liebheart" is Anna's official last name according to the Japanese anime page, but "Liebert" is her official name according to the English translation of the manga. Please do not request edits to her name.
