The woman who was raped is also a migrant worker. She was called to Ansari's home on the pretext of preparing biryani.
The assault came to light after the girl, staying with her mother, brother and grandparents, told about the abuse to one of her relatives 10 days ago.
The 20-year-old Dalit woman was raped by four men from the upper caste community in Hathras on September 14. She later died due to her injuries at a hospital in Delhi. The victim was cremated near her home on September 30.
Kappan was arrested on October 5 while he was on his way to Hathras, home to the young Dalit woman who died after being allegedly gang-raped by four upper-caste men.
The brother of the 19-year-old Dalit woman told reporters on Saturday that the family wanted to shift to the national capital and continue their fight for justice there.
The body of the class 5 student, who had left home for tuition, was found behind a bush near Chidi village in Ramgarh police station area. An SIT has been formed to investigate the case, the officer said, adding the culprits will soon be arrested.
Justices Pankaj Mithal and Rajan Roy fixed November 2 as the next date of hearing.
AICC general secretary K C Venugopal recounts Rahul Gandhi and Priyanka Gandhi's journey to meet the family of the Dalit girl who was allegedly raped and murdered in UP's Hathras.
After her death, the last rites of the girl was performed after midnight sans the presence of her family members, for which the UP government drew widespread criticism.
Sindhu, who was part of a Left delegation that visited the remote village in Uttar Pradesh recently, firmly believes that the Hathras incident was a brutal assertion of casteist and feudalist powers.