'Highly motivated' and 'competitive' are two characteristics former classmates used to describe 23-year-old Darinne Ko Wen Hui, the student said to be involved in the NUS sex-for-grades case.

Yesterday (Jul 27), NUS law professor and former district judge Tey Tsun Hang was charged with six counts of corruptly obtaining gratification from Ko in 2010. These came in the form of two charges of sexual gratification, as well as items such as a Mont Blanc pen, two tailor made shirts, an iPod touch and a $1,278.60 bill payment.

According to a report on The Straits Times, Ko was also known to be active in class discussions and will speak with lecturers after class.

She was also remembered as being tomboyish and would sometimes don a Manchester United football jersey to school.

Ko graduated last month and is believed to have obtained a second upper honours degree.

She first met law professor Tey Tsun Hang in an equity and trusts class in 2010, before taking his personal property law class at the end of last year.

In 2010, she was part of a group of students who helped Tey prepare a law textbook titled Trusts, Trustees And Equitable Remedies.

Prior to entering NUS, she studied at Raffles Girls' School and Raffles Junior College.

Her LinkedIn profile online listed her as being on a training contract with law firm Rajah & Tann, where she had also interned at previously.

Speaking to the Straits Times, her peers believe that she is not enrolled in a preparatory course leading to Part B of the Singapore Bar Examinations.

To become full-fledged lawyers, law graduates must pass Part B of the examinations and undergo a pupilage term at a law firm of about half a year.