Skill 2 Volume 3

In that moment, Stella disappeared from before Akaza's sight. No, not disappeared―it wasn't that he had lost sight of her, but that Stella had stepped in between intervals of his awareness.

The ancient martial arts footwork, Trackless Step. For someone of Stella's class, as long as she understood the principle, it was not a difficult technique to reproduce. Stella carried Ikki past Akaza without him being aware of it.