All of Lazerivic's soldier's (Tetram, Dragon, Lovac, Sark, and Vodnik) are now silent skins. They make no climbing, grunting, or any other sounds now. The only sound you'll hear is their key-chains rattling or something.
They have always been silent for me except Sark, who has a generic custom villain voice. I tried Lovac and Vodnik and I thought my game was wrong because they were making absolutely no sound.
I've been using Dragon for weeks and never noticed he was silent until today..