Ajamila becomes allured by sensuality and lives a life of debauchery. Because he named his son Narayana, and consequently chanted the Name of the Lord, he was delivered from hell at the end of his life and given a second chance.
The great devotee Haridas Thakur was a saint loved by all. The local Muslim population cherished him along with the Hindus of West Bengal. This was seen as a threat by the local Muslim government so they sent a prostitute to Haridas so that they could frame him and ruin his reputation.
Hiranyakashipu is a great materialist who gives birth to a saintly son Prahlad. His frustrations eventually lead him to try to murder his own son. The Lord intervenes in a most magnificent way.