The inspiration came from the cool granny illustration from artist Max Ulichney. The picture gives me a warm and happy feeling, especially this grandma's energy. I like the style so much.

For each interest point, I found several matching images to support the idea from the illustration.

Blocking in Zbrush.

Cloth simulation in Marvelous Designer.

Mesh UV.

Painting textures.

Rigging and rendering in Maya.

Final render.