She is described as the protector, guardian and caretaker of all beings who suffer.
Isis was supposed to ward off all demons that tempted and misled people in order to remember what had been lost in human abilities.
In the myth, Isis brings her dead husband back to life after he was killed by Seth.
Seth was jealous of Osiris' success and fame. With accomplices, he created a magnificent sarcophagus to be given to the person who best fit into it. But the chest was built to fit Osiris perfectly, since Seth had previously secretly taken measurements of Osiris. When Osiris went into the sarcophagus, Seth slammed the lid of the coffin shut, causing Osiris to suffocate and his coffin was thrown into the Nile.
Isis didn't believe her husband had died and started looking for him, she was able to find the coffin and bring it back to Egypt. She decided to bring Osiris back to life with potions and she hid the body while her sister and Seth's wife, Nephthys, kept watch. Seth learned Osiris's location from Nephthys, found him, and cut his body into forty-two pieces. He scattered all of Osiris' body parts throughout Egypt. When Isis found out, she was devastated and her sister felt guilty and promised her that she would find all the pieces and bring Osiris back to life. So it happened, but Osiris was not complete, so he descended into the underworld to become the rightful judge of the underworld. But before Osiris descended, Isis was able to conceive his child named Horus (god of the sky).