Right before Boba Fett killed Jodo Kast, he ripped off Kast's helmet to see who he was. "Let's see who you are." Boba didn't reconize his face and got very angry. "You're NO ONE! Not Dala! Not Shysha! No one! You didn't earn this armor!" Obviously, Jodo was NOT a "true" Mandalorian Warrior. But, who are Dala and Shysha? Are they other Mandalorian Warriors? Relatives of Boba? Perhaps Boba knew them in the clone wars? Or perhaps Jango Fett or Ambu Fett knew them? I don't think Dala was the same person as Admiral Dala from the Jedi Academy Trilogy, Darksaber, and Planet Of Twilight. Only Boba knows. Perhaps we'll find out in a future EU novel or comic.