In the second episode of Soul Eater, during BlackStar's fight with Mifune BlackStar, Tsubaki used Shadow Star to swap places with BlackStar and disguise herself while BlackStar attacked Mifune's blind spot.
Just before this, Mifune noticed BlackStar (apparently now Tsubaki) is a different person from the way he was breathing. He also commented that BlackStar's eye colour had changed.
So when exactly (episode time) did BlackStar and Tsubaki swap? Was BlackStar's eye color different at that moment or did it change suddenly later? And if it changed later, when was that?
NOTE: I ask this question as every time I re-watch the episode, I'm engrossed in the fight and keep missing it