Daughter of Yeolson and the future great spiritual mother of Wahan tribe. As well as Eunseom, Tanya too is a girl born with a blue comet. Although she is clever and cheerful, she has one big concern - that she cannot dream, which is a qualification to be a successor. On the day Tagon arrived at Iark, she is taken to the far land of Arthdal, and faces the truth about the fate of Wahan tribe.