Thanyarasmi Siraphatphakorn, a 21-year-old student, was named Thailand's most beautiful kathoey on Friday in the 10th annual Miss Tiffany Universe competition for transsexuals. Along with the tiara, Thanyarasmi won a 100,000 baht cash prize and a new Mercedes Benz. The winners of the Miss Tiffany pageant are often showered with entertainment deals, but Thanyarasmi said she wanted to return to the Issan region where she grew up to become a social worker.