Light was called Kira Fact Check

Furthermore, instead of obtaining ... Note's god-like abilities. Mia Sutton (based on the sociopathic qualities of Light Yagami) is Light's girlfriend, a classmate who assists Light in his activities as "Kira", before supplanting him as Kira....

Detective Light Yagami, also known as Kira, is the main protagonist of the Death Note series.

The end of the manga shows that ... starts to describe Light Yagami, son of Soichiro, as a persona, while he identifies as Kira, God of the New World....

The name Kira was created by the public in response to Light Yagami's initial use of the Death Note, and various members of the public view Kira as a god. Various Death Note users act as Kira, but their identities are unknown to the public so ...

The name Kira was created by the public in response to Light Yagami's initial use of the Death Note, and various members of the public view Kira as a god. Various Death Note users act as Kira, but their identities are unknown to the public so ...

In episode 2, at around 12 minutes, Light explains that the name Kira was taken from the English word "killer".

If it was not for those rules, Light would have been convicted. Then in chapter 58/episode 25 (18:45) L dies and in chapter 59/episode 27 (1:25) N and M come into play and the cat-and-mouse-game starts all over again. Chapter 60/Episode 27 (13:22) (M): The killer must know about the abduction of director Takimura. Chapter 63/Episode 27 (20:27) (N): L is a fake and now called L2.

Plus, soon afterwards, L asks Light how Light would, if Light were L, go about proving someone to be Kira, and L notes that Light has a suspiciously fast answer—other detectives L had asked required minutes to formulate one. L intercepts Light's call to Misa.

There is a video made by Aleczandxr, which is called “Justice Doesn’t Exist in Death Note”, where he makes that exact argument. Neither L nor Light are actually trying to create justice. Both are just trying to satisfy their own egos. There’s an interesting quote from Light. He says, “If we catch Kira, he is evil.