Hiranyaksha  is the antagonist of the story.

He did tapasya for Brahmadev. Brahmadev became pleased with tapasya and appeared and said," Hiranyakashyap , I am pleased with your tapasya and devotion. What boon do you want?"

Hiranyaksha said," Hey Brahmadev. I want to be immortal".
Brahmadev said," I do not give you that boon".

Hiranyaksha said," Hey Brahmadev. Give me a boon that no human, no animal can kill me. I cannot be killed inside room or outside any house. No weapon call kill me. I cannot be killed during day or night".

Brahmadev said,"TATHASTU".

Then Hiranyaksha thought that he cannot be killed by anyone.
He didn't liked Lord Narayan and opposed his devotion. He disliked all Vaishnavs and he forcefully stopped Vishnu Puja.
His wife Kayadu was also a Vishnu devotee but she had to stop Vishnu Puja for her husband but he prayed to Lord Vishnu everyday.

When Kayadu came to know that she will become mother, she became very happy and thought that it is all because of Lord Narayan.

She thanked Lord Narayan and everyday she used to do take name of Narayan...