Blackjade was born into the world of Materia Magica by chance. All though she is totally clueless on certain parts of Materia Magica, her struggle and trivial questions are slowly being justified. She is still young and takes each day as they come and learns slowly but she gets there in the end.
All is never revealed with Blackjade. You could say she has a multi personality, the question is, Which will you see? And would you be lucky enough to see the others? Only time will tell!