Tashi is the Crown Prince of the Land of Sand. His formal name is Irada Ki Aku, but most of his subjects call him Tashi. And one of his most noticeable traits is his eyes, which Nike describes as looking like jewels and blue pine.
He is a much beloved Prince in his empire and genuinely cares about the well-being of his subjects. He came to the Sun Kingdom in order to studied the Sun Kingdom's irrigation facilities and to request aid for their water supply because the oasis of his land has been drying up for the past few years and towns have been swallowed up by sand. Additionally, rain in the Land of Sand has begun to fall less and less. To his people, water is like blood and rain is like a "miracle," which was why he looked so devastated when Nike made it rain as a spectacle. When Nike realizes how much the spectacle and the luxury she showered him with made him feel pained when his own people were suffering, she apologizes and decides to go to the Land of Sand with him and Falaha to help his people. Tashi eventually falls in love with Nike and later, attempts to kidnap her not only for his empire but because of his own personal feelings towards her. Although he was willing to accept any punishment from Livius for doing so, Nike convinces Livius not to punish him or his empire.
According to Neil, he is ruthlessly pragmatic. He will use any means necessary to maintain the profits of a free country and if another country tried to use unflattering methods to damage the Sand Empire's reputation he would retaliate with all his power. From that intensity, he earns the nickname "The Prince of Thunder." Despite this, he is also a kind and gentle prince who cares about the well-being of his subjects and listen to his subjects' plight. Under his management, he has helped his Empire improved greatly despite its improvise state. He also known for being incredibly moral and responsible, which is evident when he admits to trying to kidnap Nike and keeping her in his kingdom to Livius even though he knew that he could be severely punish for having done so.