Sir Rebral is a member of the order of the White Knights located in the courtyard of the White Knights' Castle in Falador.
He is the taskmaster for the Falador Diaries, to whom players may speak in order to start registering their progress in the diary. He also provides players the Falador shield for the completion of the easy, medium, hard and elite Falador tasks.
|24 March 2016
(update | poll)
|It is now also possible to get multiple copies of achievement diary equipment by talking to relevant diary masters or by talking to Perdu, found upstairs in the Edgeville general store. Perdu will charge a small fee.
|12 March 2015
|Information on achievement diary rewards is now available from each of the taskmasters at any time rather than only when you complete a diary.
- His name is a pun of the word "cerebral".