'Alone' in the Bible

Then the Lord God said, “It is not good for the man to be alone. I will make a helper as his complement.”

Then the Lord said to Noah, “Enter the ark, you and all your household, for I have seen that you alone are righteous before Me in this generation.

Jacob was left alone, and a man wrestled with him until daybreak.

But Jacob answered, “My son will not go down with you, for his brother is dead and he alone is left. If anything happens to him on your journey, you will bring my gray hairs down to Sheol in sorrow.”