An Hyena/Hyena

Sgrìobag is a monster who lives in a plain white world, but with the help of her pencils and paper it does not stay white for long. Sgrìobag draws a laughing hyena called Iain.

His serious friend Tormod the warthog is coming for tea and Iain wants to stop laughing all the time. Iain and Sgrìobag hear someone playing a beautifully sad tune on a violin. So Sgrìobag draws Iain a violin of his own, but Harry can only play happy tunes.

Perhaps the squiggle pad will provide another clue.