El Thrauco is described as little man, with no more of 80 cm. of height, with macho-like shapes, an ugly face, but a sweet, fascinating and sensous glance; he doesn't have feet just only a pair of stumps. El Thrauco wears a Quilineja dress and hat, and in his right hand he carries a stone axe, which replaces a twisted walking stick (The Pahueldún) when he's before a young woman.
When El Thrauco sees some beautiful girl coming in to the woods, he comes down quickly and then gives three strongest strokes with his axe on the Tique trunk. With this action all trees around seem start falling down.
When the young girl steps out from her surprise, El Thrauco is now by her side. He (blows) softly over the girl with his Pahueldún. The girl can't resist turn away her glance on the brighter and diabolic Thrauco's eyes, and falls in a pleasurest love dream.
After a few minutes, maybe hours, she wakes up dizzy and with tears in her eyes. She is almost undressed. So quickly shake the leaves on her hair, she closes holebuttons, and still a little perplexed runs home.
Months pass by, and the girl's body is getting transformed, because she had been possesed by El Thrauco.
After nine months the Thrauco's son is born. This fact doesn't affect the social life of the child and his mother, because both are related now to the mysterious Thrauco's magic.