Speed☆Star (速☆星 (スピード スター), Supīdo☆Sutā) is a technique used by Black☆Star and Tsubaki in her Ninja Sword form. By using Soul Resonance with Tsubaki, Black☆Star is able to move at extremely high speeds. To perform this technique Tsubaki must initially transform into her Ninja Sword form before they resonate with each other to greatly increase Black Star's speed, to the point where even his movements can't be seen. This allows him to perform both rapid attacks and defensive evasions, granting Black Star the advantages of being able to not only approach and attack either an enemies blind or weak spot, but to also allow him to better engage and fight in close combat which the Ninja Sword is best suited towards.