Greyfell is a male alicorn currently roaming free with Silveny, as of Legacy. His coat is silver with blue-tipped wings. He was previously the only known alicorn in the Lost Cities, living in the Sanctuary for years until Silveny was discovered by Sophie in Exile. Greyfell has many horrifying memories from his past, which he shared with Sophie. They were so traumatizing, he had to be sedated because he began to rear after Sophie saw his memories. Sophie understands that he has had a much harder life than Silveny and has witnessed the murder of his own kind and his past mate. As of Flashback, Greyfell is the father of a set of alicorn twins, Luna and Wynn. He is quite protective of Silveny and the twins.
In Neverseen, Silveny transmitted memories to Sophie of Greyfell and her "playing". Sophie and her friends are disgusted but happy for them, because that means that Silveny is pregnant.