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).
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.
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.
L is obviously one of the most important characters. He is a brilliant detective with an eccentric personality. His intelligence and unorthodox methods are key to the story. Near also plays an important role. He is another highly intelligent character who is involved in the events related to the Death Note.
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'.
There's Ryuzaki, who plays a significant role in the story. He's involved in the investigations related to the Death Notes.
Obviously, L is a very important character. He is a super - intelligent detective with unique quirks. His deductive skills are second to none, and he is constantly on the hunt for the truth regarding the Death Note. Then there's Near, another highly intelligent individual who is also involved in the events related to the Death Note.
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.
The main character is L. He is the brilliant detective who takes on the case in the novel.
Thomas, without a doubt. He's brave and always ready to take on challenges. Minho is another key character. He's a strong and skilled fighter. Teresa also plays a major role, although her actions are sometimes controversial as she's involved in some complex situations with the group.
The two main characters are Light Yagami and L. Light is a brilliant student who discovers the Death Note and starts using it to kill criminals, believing he can create a new world order. L, on the other hand, is a world - famous detective who is determined to catch Kira (Light).