As she was about to marry Death Someone interfered So she ended up marrying Pain instead
Since then, Not even a single day passed that she had not planted tears on the ground. She planted them with her own bare hands. Her own bare trembling, frail, bone dislocated, muscle squashed up, ligaments torn hands.
Until the time came When the tears she planted came to life The land gave birth to Hurt, Sadness, and Regret.
She continued to feed them with her tears until she was all dried up. Until it was time for harvest.
But it was not the three to be harvested, it was her.
Her time has come, the time she can finally met Death.
Hurt, Sadness and Regret were farmers of death. Messengers, deliverer, bringer of death. They were tasked to harvest her, and deliver the harvest to Death.
Hurt was first, to strike her down with his scythe. Delivering immense pain in her already smashed up body.
Sadness took over, putting her on a box, memories started flashing before her and in a spit second she relived her life. Her mind not being able to handle this extreme phenomena, it no longer was able to hold soul in.
So her soul left. She was now being delivered to Death.
With a little bit of consciousness that remains, she asked
"Where is regret?"
So they answered
As you are about to meet Death, travelling to the void, we are to accompany you.. But his task is different.. Sadness and Hurt may be lost in the void, but never Regret..
Regret remains...
Regret is someone the void could not contain. Even the void could not eat him . So he remains in this world as a reminder of your life. He remains so that a single bit of you remains in this world.