Mu (無), or Nothingness, is a concept in the Death Note series explaining that all humans, without exception, will eventually die and cease to exist, describing the fact that there is no afterlife in the story.
The Death Note clearly states that the user can't go to Heaven or to Hell, however the Shinigami Realm is not Heaven or Hell. Therefor it is not barred from being entered by a Human under the terms of the "Heaven and Hell rule". The Death Note also states that Humans go to Mu (Nothingness).
Fact: It has never been mentioned in the manga or anime that the Shinigami Realm serves as purgatory. In fact, it is specifically stated that humans simply cease to exist upon dying, and that heaven and hell do not exist.
The Shinigamis become how they are because they commited suicide and as punishment they have to collect souls. If a shinigami fully remembers his or her past life before becoming a full shinigami, he or she disappears and becomes a ghost. They become full shinigamis by collecting their first soul.
In Death Note. Ryuk is a Shinigami bored with the activities (or lack thereof) of the Shinigami realm, so he decides to obtain a second Death Note and drop it in the human world for someone to find, hoping to relieve his boredom. He succeeds in tricking the Shinigami King out of a second Death Note.
However, just as Shinigami cannot see each other's lifespans, humans cannot see their own lifespans or lifespans of other Death Note owners. Shinigami and those with the eyes will always see the names, even if they are not in the family registry.
If you write, "die of disease" for the cause of death, but only write a specific time of death without the actual name of disease, the human will die from an adequate disease. But the Death Note can only operate within 23 days (in the human calendar). This is called the 23 day rule.
Due to many similar characteristics, it has widely been believed that this Shinigami could, in fact, be the reincarnation of Light Yagami. Although this has been debunked, and goes against the series' continuity, Light's reincarnation theory has remained a popular Death Note Myth.
I would say Ryuk. Ryuk understood the stakes a lot more than Rem. Rem was too naïf and can in a way be partially to blame for everyone's death. In the chess game that the show was, Rem was too easy to manipulate, so in my opinion was a worse Shinigami because of his conscience and humanity.
The Shinigami King (死神大王, Shinigami Daiō), also known as the King of Death, is the ruler of all Shinigami in the Shinigami Realm. ... Many Shinigami refer to him as the "Old Man," and Death Note 13: How to Read says that he "must be very old" because of this.
Shinigami may be male or female. They cannot and are not permitted to have sexual relations with humans, nor can they have sexual intercourse with one another. They are also unable to reproduce. Despite this, Shinigami may still carry emotions pertaining to others, be it human or shinigami.
Midora obtained this second Death Note by bribing the Shinigami King with human apples, a delicacy introduced to the Shinigami Realm by Ryuk. Midora dropped the Death Note into the human world and it landed in Japan (whether this is a coincidence or intentional is unknown).
But Ryuk decided that if he was captured, Ryuk would have to wait around for Light's eventual death in prison, which Ryuk deemed boring. Seeing the situation as a lose-lose, Ryuk reminded Light of what the conditions of the Death Note were and wrote his name in the Death Note.
Sometime after Light's death and Ryuk's return to the Shinigami Realm, Ryuk becomes popular among other Shinigami due to his time spent in the Human World with Light. Eventually, Ryuk's story catches the attention of an unnamed Shinigami, who visits Ryuk to hear it.
TV Drama. Near (ニア, Nia) is the younger of L's two successors, raised in Wammy's House—Watari's orphanage for gifted children in Winchester, England. After L's death, Near begins his investigation of the Kira case, gathering evidence over a period of four years.
As stated earlier, Ryuk is only following Light around for entertainment value. His little trip to Earth is basically a getaway from the boredom of the Shinigami world and a way to get a vacation from his Death God job for a while. This leads to the truth of the matter. Ryuk really doesn't care about Light.
Ten years have passed since Light died. Misa continues her work as an actress while her activities are secretly supervised by police officers. She regains her memories after cyber-terrorist Yuki Shien gives her a Death Note.
When Light's father died, he saw Light's lifespan with his Shinigami eyes, so he could "confirm" that Light was not Kira. However, at the end of the story, Mikami looked at Light with his Shinigami eyes and recognized him, because he could not see his lifespan.