Azrael

"When dad kicked you out, the whole family was rocked, especially me"

-Azrael to Lucifer

Azrael is an angel and one of Lucifer's siblings. She is nicknamed the "Angel of Death" and had a unique blade that eradicated anyone killed with it, but it's currently in the Void. She is the guardian and creator of Death and is tasked with not only helping to collect and guide the souls of the deceased but also to work closely with Death, to make sure she or any of the other Gods who use her power over death abuse it.

History
Before existence was created, all that existed was the void, the infinite expanse of nothingness and emptiness. But within, this expanse walked a being with the power to both create, and exist by himself- this entity would be known as 'God', the creator himself. As he wandered creation forever alone, though equipped with unlimited true power, he was still alone. Until, he met another being like himself, 'The Divine Goddess'. They both instantly fell in love with each- other, but both did not want to continue wandering the void aimlessly, in response, God created creation- a creation within the nothingness where they could finally call home.

Although they could bring creation into existence, they needed help in finishing it, giving it a true shape. So, God created three brothers, he fused with unlimited power: Micheal Demiurge, Gabriel Hornblower, and Samael (who would later be known as, 'Lucifer Morningstar'), after they were given their powers, God guided them into how to use their new powers over creation- and with that, they helped to form the Omniverse, Heaven, and Hell- and all of creation

.Azrael was one of the many angels created by God and Goddess. Like her siblings, Azrael serves God. She was very close to her older brother Lucifer and enjoyed pranking Amenadiel with him. Sometime after Lucifer rebelled, she meant to come to visit him, even in Hell but became too busy dealing with souls, as the angel of death. During this time she also helped not only to collect but also guide the souls of the deceased into the afterlife. However, a majority of her time was spent with Death, as a way of watching over the souls of the departed and to prevent any god using the power of death from abusing it.

Azrael met Ella Lopez when she had gotten into a car accident when she was eight and befriended her. She would occasionally stop by and meet Ella whenever she was near her. At some point, she told Ella that she was a ghost to hide the fact that she was an invisible angel. Azrael had been the primary factor in Ella moving to L.A. and meeting Lucifer because she thought that Lucifer could help Ella and vice versa. Uriel stole her blade when he went to Earth, with the intention of killing their mom. The blade is later been revealed to be a part of the Flaming Sword.

Personality
Lucifer described her as "no sweet peach", implying her personality rubbed off on the dagger; as Maze put it "that's one angry-ass knife". When she showed up in L.A. it is shown that she is the opposite of what Lucifer described, being rather friendly, and even while with the blade, she developed a close friendship with Ella. This suggests that her more violent personality was the product of using the sword. Lucifer's comment may have also been out of bitterness since Azrael, who he had once been very close to, never took the time to visit him after his banishment.

During her interactions with Lucifer, Azrael was shown to care deeply for her brother and to love him greatly. Azrael clearly looked up to Lucifer and loved pranking Amenadiel with him. Even after not seeing Lucifer since his rebellion, she still cared greatly about him and missed him deeply, regretting the fact that she never came to visit him. Her bringing Ella to L.A. was designed purely to bring her two favorite people together so that they would have each other when she couldn't be there for them

Powers & Abilities
Azrael shares many of the same abilities as all other angels. However, as the angel of death, she also interacts with the dead. However, as the creator and guardian of Death itself, all beings who use death as a power source- actually take their power from her, making her one of the more powerful angels in Creation.
 * Angel Physiology: As an angel, Azrael has their physiology, including superhuman strength, speed, stamina, durability, agility, reflexes, intelligence, immortality, flight via wings, and shape-shifting (being able to hide her wings) in addition to invisibility as well as their weaknesses.
 * Immortality: As an angelic celestial being, Azrael is immune to age, having lived since the beginning of creation, and is also impossible to harm by any means which can kill or injure mortals easily. However, she can be harmed by supernatural weapons and means.
 * Invisibility: Azrael has the power to appear invisible and choose who can see her. Typically only dead humans will be able to see her.
 * Shape-Shifting: Azrael is capable of altering her true angelic appearance, making herself look like a human female, hiding her wings.
 * Dimensional Travel: Azrael is able to travel between Heaven and Earth (and possibly Hell).

Creation of Death: Azrael is both the creator and guardian of all death and life, often working with Death to meet with the recently deceased and helps guide them into their new existence. She also visits people as they are born. Evidently, only she seems to remember these encounters.
 * Gift of Death: Azrael has the power to free the soul of a body and send a soul to his appropriate destination (usually an afterlife or reincarnation). She and Death often leave these tasks to various Death Gods- which she helped convince her father into doing, to help with the massive job. For Death Gods or demons to claim a soul instead of herself, they usually have to have a valid claim on the soul; either a contract or the deceased worshipped the Death God's pantheon. The exact nature of the relationship between Death Gods and Azrael itself is unknown, but she is extremely close and chummy with Death herself, as she is a creation of her.
 * Gift of Life: Azrael apparently is also there at the time of someone's birth and can infuse a body with life. She commonly does this at the time of birth or at certain times to give another a second chance (reincarnation) the criteria for the latter is not known.
 * Magic
 * Metamorphosis
 * Omnipresence
 * Omniscience
 * Nigh-Omnipotence
 * Teleportation

Trivia

 * Azrael and Remiel are the only known female angels who willingly show themselves.