HIH/HRH Sophie Thorsen Yisserless (April 3303-) was the Royal Princess of Beiteynu and Imperial Princess of Davostag. She was the daughter of Davostag Imperial King Harrisen I. She married Prince Levi Aaron Yisserles of Beiteynu in 3319 and converted to Yeudism. She gave birth to Joshua Gaston Yisserless in January 3320 and then Sarah Martha Yisserless in April 3327. She currently resides in Beiteynu.