Vrishnis were an ancient vedic Indian clan who were believed to be the descendants of Vrishni, a descendant of Yadu. According to the Puranas, the Vrishnis were residents of Dvaraka. It is also believed that gods manifested themselves in form of vrishnis to help Vishnu avatar as Krishna. Even though most of the vrishnis were destroyed due to a curse by sages because of a miskake done by Sri Krishna’s son, some of them survived and were living disguised in order to help the kalki avatar.. So in order to show their disguise we are showing them as tribes.