Silentfrost

"'My brother is an idiot...' Silentfrost to Sunflame about her brother's actions"Silentfrost is a Silent protagonist and one of the 6 main protagonists of the Dark Forest Arc, along with Drizzlestar, Brokeneye, Leafstorm, Spottedclaw and Ravenclaw. She is selectively mute due to trauma.

Dark forest Arc
Silentpaw does not talk a lot in the Dark forest Arc, as she is seen many times with her brother remaining silent. But she is constantly getting coaxed to talking.

Drizzlestar pushes her in the river, Vapor captures her and holds her as a prisoner to try but nothing works. She finally speaks in the final battle when she is facing Shadowstreak. and she even beats the spirit, showing that she is strong when she is pushed to her limits.