Fancy-dress shop owner

The Fancy-dress shop owner(Asyff Bymajique) runs the Fancy Clothes Store in Varrock. If you have Hunter furs or hides, he will make them into Hunter clothing for you for a small fee. He is also involved in Eagle's Peak.

Trivia
The Fancy-dress shop owner is a reference to a 1970's British childrens' cartoon series Mr Benn. In the cartoon there is a shopkeeper who wears nearly identical clothing and also runs a fancy dress shop.

The following link contains a picture of the shopkeeper as he appears in Mr Benn. 

The owner appears to wear the equivalent of a purple fez.