Sark, after everything that happened to him as a child, was an unsociable person. He spent all his time with books, and he also hated it when someone tried to find out why the boy was so obsessed with books. However, he needed a friend to talk to, but who would not ask questions. So Sark made a Trug.

Trug was a dead cub of a treant, which the boy revived with a large candle. The created creature became an excellent assistant for Sark. Trug unquestioningly followed all the instructions and did not ask questions.

Trug was nearby and listened to the boy's ideas on how to destroy demons. His wick lit the way for Sark in the dark caves where the crown was found. And it was Trug that was the only source of light in the ice castle.

After the death of his master, Trug remained near his master until he froze and his wick went out. Who knows, maybe if it is lit again, Trug will find a new owner.