"The Dagger" is the title belonging to Joanna Beauchamp. The function

of the Dagger and its powers are still unknown title.
Battle against the King[]
While fighting against her father, Joanna was referring to herself as "the dagger" and cast a spell next to Wendy, Ingrid and Freya, managed to defeat the King.
Character[]
In the drawing found in the book, Joanna is seen wielding a silver dagger.
Powers[]
It is unknown whether as "the Dagger" Joanna has arcane abilities.