Who are these characters in episode 25 of Sword Art Online? In 13:32



Who are the characters in the 3rd and 6th position from the left side? I can't recognize what episodes they were from previously.
From the left to the right (not including Silica, Asuna, and Lisbeth): 


Yolko (Ep. 5)
Sasha (Ep. 11), the one with the glasses
Yulier (Ep. 12)