Silverstream, or Silver Stream, is a female Hippogriff/seapony, Terramar's older sister, and one of the Young Six, who first appears in season eight of the show as a student at Twilight Sparkle's School of Friendship. She is portrayed as incredibly hyperactive and bubbly seapony, which is very curious about the world around her and unfamiliar with creatures like changelings and griffons or social concepts like boredom and sarcasm. My Little Pony cursor pack with fanart Silverstream.