The Trio was founded by Harry Potter, Ron Weasley and Hermione Granger and the members we're
- Harry Potter (formerly)
- Ron Weasley
- Hermione Granger
Later they were away from each other and Harry Potter couldn't join this group because he married Caitlin Malfoy by having a child named after Draco Malfoy's ancestor, Delphini Diggory's father, and Voldemort's maternal uncle.