Each of the three angels that came to Abraham had specific purpose. The angel Raphael, who is the angel of healing, came to heal Abraham from the circumcision. The angel Michael is from the right and delivers good and blessings. He came with a message to Sarah that she will have a child.
The Angel Gabriel, from the Left, governs all judgments in the world. Angel Gabriel deliver the judgments and the angel of death executes them.
The angels follow their missions. Gabriel is a messenger of the Holy Soul from the level of Neshamah and the angel of death follows the mission of the soul level of Nefesh from the side of the Evil Inclination. The soul doesn’t leave the body until she sees the Shechina.
The Shechina includes the roots of the souls and when the body sies, the souls wish to connect to its roots. If the souls is righteous then the Shechina welcomes him into her light and lead him to the next step.If the soul is wicked then the Shechina leaves the soul to mourn its departure from this world.
Daily Zohar # 2571 – Vayera – Angels at work