There's also Near. He is L's successor in a way. His calm and calculating nature, along with his own brand of intelligence, makes him an important part of the later part of the story. And Matsuda, who is more of a normal, good - hearted cop among all these super - intelligent and complex characters. His naivete and straightforwardness provide a different perspective in the story.
Light Yagami is definitely one of the most memorable. He starts as a brilliant student with a sense of justice but then gets corrupted by the power of the Death Note. His transformation from an idealistic youth to a power - hungry killer is really striking. L is also very memorable. His strange appearance, unique habits like sitting in a crouched position and eating only sweet things, and his brilliant deductive skills make him stand out.
Mello is quite an interesting character. His determination and his somewhat unorthodox methods make him stand out. He is willing to take risks and use his intelligence in creative ways to achieve his goals related to the Death Note.
Jotaro Kujo is very memorable. His cool and stoic personality, along with his powerful stand Star Platinum, makes him stand out. He has some great fight scenes and his journey to defeat Dio is really engaging.
Light Yagami is a very complex character. At first, he seems like a normal, intelligent student, but then he becomes this power - hungry and somewhat evil figure. L is another great character. He has this strange appearance and behavior, but his mind is extremely sharp. Ryuk, the Shinigami, is interesting too. He drops the Death Note into the human world just for fun and then watches the chaos unfold.
Definitely Light Yagami. He drives the plot forward with his actions and decisions regarding the Death Note. L is his equal in terms of intelligence and their battle is what makes the story so engaging. Misa Amane is also important. She also gets a Death Note and is in love with Light, which adds a complex layer to the story. And then there's Near, who comes into play later in the story and has his own part in the hunt for Kira (Light).
The moment when Matsuda accidentally says something really stupid in front of L and the rest of the task force. Everyone just stares at him in disbelief, and it breaks the tension in the room which is usually filled with high - stakes investigations.
Definitely Naruto. He's the main character, and his journey from a nobody to a hero is inspiring. Sakura Haruno is memorable too. She starts as a girl with a crush on Sasuke but grows into a strong kunoichi. Rock Lee is also a great character. He can't use ninjutsu or genjutsu but through sheer hard work in taijutsu, he becomes very powerful. His green jumpsuit and bushy eyebrows are quite the trademark.
I think Near is one of the most interesting characters. He has his own way of thinking and investigating, and he enters the fray at a crucial point in the story. He is different from L but still manages to be a formidable opponent. Then there's Matsuda, who is a bit of an underdog among the group. His more naive and emotional reactions compared to the other highly intelligent characters provide a different perspective in the complex world of 'Death Note Light Novel'.
I'm not sure yet as it's a new story. But it could be new characters who discover the Death Note, or perhaps some descendants of the original characters like Light or L.
Misa Amane could also be a main character in a 'Death Note Love Story'. She was in love with Light in the original story. In this new story, her love for Light could be explored further, or she could find a new love interest. Maybe someone who tries to save her from the dark path she's on because of her connection to the Death Note and Light.
The main characters are Light Yagami, a smart and ambitious student who gets the Death Note. And L, a world - famous detective who tries to stop Light. Also, Ryuk, the Shinigami who drops the Death Note into the human world.