A wicked human soul is imprisoned and punished (torment of the grave) after death, it can not return to this world to do anything, and it displays regret rather than becoming defiant.
حتى إذا جاء أحدهم الموت قال رب ارجعون لعلي أعمل صالحا فيما تركت كلا إنها كلمة هو قائلها ومن ورائهم برزخ إلى يوم يبعثون
Until, when death comes to one of them, he says, "My Lord, send me back that I might do righteousness in that which I left behind."
No! It is only a word he is saying; and behind them is a barrier until the Day they are resurrected.
— Quran 23:99-100
A human shaitan means a (living) human whose behavior is like that of a shaitan.
والشيطان في كلام العرب، كل متمرد من الجن والإنس والدواب وكل شيء
And shaitan in the language of the Arabs means every rebellious one among the jinn, humans, animals and everything else
— Tafsir al-Tabary
وكل من صد عن سبيل الله وأطيع في معصية الله فهو شيطان
Everyone who averts others from the path of Allah and is obeyed in disobedience to Allah is a shaitan
— Tafsir al-Qurtubi , Tafsir al-Baghawy