Siamun is a dyer living in Sophanem. He can be found between the building with the spinning wheel and a silk stall. During Icthlarin's Little Helper, he is quite angry with the player and either refuses to talk, or rudely tells him to get lost. After the quest, he comes less hostile.
In the Rogue Trader minigame, Siamun supplies desert outfits and Menaphite robes to Ali Morrisane, if the player provides him with 3 dyes or 3 animal skins of the same type (snake, cow, wolf, or wool). He does not want "certs" (noted items), however.
- If a potion is used on Siamun, he will flat out refuse to accept it, claiming that the only potions or solutions he deals with are dyes.
- In RuneScape 3, Siamun's gender was changed to female with the release of Menaphos in 2017.
- He is known to dislike Jex, caretaker of the Temple of the Lesser Gods.