Reldo Trimmly, referred to in-game simply as Reldo, was born in the year 141 of the Fifth Age, making him 28 years old, and is the librarian of Varrock Palace. The library is located at the north-west corner of the castle, in the room to the right of the tower. He researches ancient tomes for Lores and Histories about RuneScape. Despite his relative youth, he is considered one of Gielinor's most learned humans.
Reldo makes a minor appearance during the course of the novel as the apprentice to the Varrock Librarian at the time. At the time, he was involved in a project of creating a new indexing system to better organise the books held within the library's shelves. He later escorted the Misthalin Embassy to Paterdomus in order to help administer The Blood Mark to protect the embassy throughout their mission into Morytania. It is revealed that Reldo has an amazing memory, able to cite anything he has ever read with ease, although he has trouble recalling images. Although he has demonstrated many times his adeptness at his job, he never gained the full respect or trust of his mentor.