Light Yagami

Light Yagami is the main character of the Death Note series and the one who became Kira. Prior to obtaining the Death Note,Light was a diligent high-school student who took his studies seriously,though this stemmed from the fact that he wanted to become a police officer so he could bring the man who murdered his childhood friend to justice. He wished to make a world where people who worked hard,were kind and where honest could live in peace without scum interfering with their lives,though he believed that anyone who went against him was also evil.

Personality:
He was shown to greatly distaste the current justice system,even calling a world where everything was put on endless repeat 'rotting.' When he obtained the Death Note,his personality took a darker turn and while he maintained a diligent and hard-working and honest appearance,he had developed something of a 'god complex,'now having the power to kill virtually anyone,so long as he knew what they looked like and their name. He deeply cares about his family and saves his father from the criminal arguably responsible for the pair's strained relationship.

History:
Before he made the decision to become Kira,Light struggled with the morality of that decision. However,his life was more complex. His mom died during his youth,with his father occupied with fellow criminal Kuro Otoharada instead of vising her in her deathbed,resulting to Light to grow very distant with his father. When Soichiro finally made it at the hospital very late,he sees Light and Sayu standing over her covered corpse,with Light angrily asking why he didn't pick up his calls and ending with Sayu crying for her mother. Ever since his mother is dead and his father is at work most of the time,Light has taken on the responsibility of being both a brother and a parental figure for Sayu. After he became older,he grew hatred for criminals,which suffered him throughout his life. It is possible that Kuro Otoharada was responsible for the death of Light's mother.

Memory Lost:
During his memory lost,Taro is revealed to access into Light's memories. Light then starts having memory flashes which is a quick flash of memories that were once deleted. After sitting at his desk in class,he begins to have bad headaches and images of a younger Taro begins to fill his mind. Light decides to consult Taro about it but then he collapsed and cannot move. When Light finally awakes,he has 6% of his memories left. After Taro reveals to be Young Kira,Light's memories gets rebooted and now remembers that he and Taro were once friends as a child but when on a field trip,they played near by a river and Light accidentally pushed Taro in.

L:
Considering Light 's tearful proclamation that he wanted to be L's friend forever when he thinks L's about to die and his flashback to his moments with L in his dying moments, overlaid with L saying that Light was the first person he'd been interested in and that he wishes they could have met another way, followed by Light exclaiming that "our feelings are the same"... It looks like he really did genuinely care as well. Light and L might be Frenemies,but they do care for each other. L's feelings of friendship towards Light are portrayed as genuine and it's implied that while he's still certain that Light is Kira,he really doesn' t want him to be.

Misa:
Misa is Light's girlfriend and the Second Kira. She has the Shinigami eyes,thus giving and advantage to Light.

Kiyomi:
Kiyomi is Light's second girlfriend and the girl she used to be with at school. She is now a spokeswoman for Kira.

Ryuk:
Ryuk is Light's Shinigami and often gives him apples. Light likes to satisfy Ryuk throughout the series for his own entertainment.