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Go to the polygon level and select all polygons on the ear area, extrude them.
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Target weld the front two points with the head part, so here we got the ear lean from front to the back.
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Cut a line on this lean, the thickness of ear is coming out from the head now.
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Connect a line between all lines on this thickness, with the Ring.
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Scale the new circle line smaller, and then adjust all lines.
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Cut a line on the ear area, this line I will build a bump on the top of the ear hole.
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Select all polygons on top the ear, and click the inset tool to create a room inside the ear.
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Cut another line on the right top of ear
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Go to vertex level and choose the points that are made by the line crossing with the ear, and move them to the right top.
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Cut a line in the middle of the ear, and here we got the area with the line we cut before.
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Extrude it.
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Cut one more line below this bump. And there is a new area like a square, bevel it inside the head to get the ear hole.
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And extrude the lift polygon on the outside of the hole. There we cerate a bump on the outside of the ear hole.
Remove the line on the ear, sometime the line is a little bit mass, just remove it.
And then cut a new line, to create the shape of back of ear.
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Cut the last line on the ear behind the ear hole.
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Extrude this new area.
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Now I finished building all the basic lines on the ear, the last step is to go to the vertex level, and adjust all the vertexes fallow the picture.
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Go to TurboSmooth to check the shape of the ear.
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