Question

who is kalki in vedas and Puranas?

Answer 1

The Kalki Purana is a prophetic work in Sanskrit that details the life and times of Kalki, the tenth and final of the Dashavatara (the ten Avatars) of the Hindu deity Lord Vishnu. 

Answer 2

10th avathar .. in Purana...
he will come in Kaliyuga ending...to kill asuras...
now we are Kaliyuga.
l hope it will help you friend