Sasha was in the hallway next to Blackgaard's office in Blackgaard's Castle, until Lucy came over and made a loud noise. When Blackgaard came out to see what the noise was, Lucy ran off and Blackgaard thought Sasha made it. Later, Sasha hissed at Greg Kelley in Waylaid in the Windy City.
Sasha is perhaps not very talkative, but very loud. In #83: “The Battle, Part 1” she meows five times and purrs once.