After being abandoned by her birth parents due to her abilities, Anna was adopted by Kino Asakura. Because of this, her date of birth and blood type are unknown.
Aggressive and decisive, Anna is a pragmatic person who, to most, appears cold and harsh. However, she has shown that she genuinely cares for those important to her, especially Yoh, and merely is dedicated to be "the ultimate Shaman Queen" and wife to Yoh, the first real friend that she ever had in her life. She firmly believes that Yoh Asakura is destined to become the Shaman King, and thinks that it's her duty as his fiancée to make him train hard for it.