Arnella Nyman is one of the most successful Finnish Icelandic horse riders in history. She is many times Finnish champion and represented her country many times on the Nordic and World Championships.
The horse she is riding on the drawing is Thór från Järsta, who is shown in V1 and T2.
 
If you want an inspirational morning coffee/tea with the quote and drawing of Arnella, then this mug is definitely the one for you!