SecondGen Black-Silver was a second generation Sentry.
In 2381, he was one of the Sentries that sent a drone to meet the crew of USS Titan aboard FirstGen One-Five. Later he was part of the meeting in dataspace where SecondGen Red-Gold began his rebellion against the FirstGens. Afterward, he was part of the battle force which engaged the Null when it entered the Sentry's home system and began its final incursion. He was killed almost immediately, making him one of the first Sentries to die that day. (TTN novel: Synthesis)