You would need to first find a very unbiased person, and good luck finding one on here, almost everyone is a fan of some character.
Stories aren't necessarily supposed to be unbiased.
"Naruto" is horribly biased toward Naruto and the things Naruto considers important.
The thing that written authors have at their disposal is a much better medium to explore individual characters. Text and thought in a novel is very inexpensive - while it is valuable real estate in a manga/comic. Explaining something like Izanagi may take about 200 words in a novel out of a single chapter of 8000 words (my relative target for each chapter) - but take 2 full pages out of 16 pages of a manga chapter.
Characters in novels can also more easily remain relevant to the reader even when their role in the plot is minor.
For example, I have forbidden myself from using the Third Person perspective and, instead, use what used to be known as Second Person perspective (now more commonly referred to as Third Person Limited as opposed to Third Person Omniscient). Thus, I write from the perspective of a character and 'limit' the perspective of the reader to the character I am currently using to portray the plot.
Thus, every character the readers spend time with has a purpose even if that purpose is simply to convey information to the reader that the rest of the cast may not have (or be reasonably expected to know).
I also think it provides a more natural way of experiencing the world.
People who write in the Third Person Omniscient perspective tend to get carried away. During an argument, each person's thoughts are frequently revealed, destroying the immersion. If, for example, Naruto and Sakura are having a heated argument over a misunderstanding, it pulls the reader 'out of the moment' when the thoughts of Sakura reveal that there is a misunderstanding. Even if, using the second person, the author has established that there is a misunderstanding - jumping back and forth between the minds of two people in the middle of an argument is mentally exhausting for a reader and often destroys any introspection into either character.
I've also found it tends to lead to 'flat' statements. "Naruto was disappointed."
"Hinata was sad."
"Kiba was excited."
While, sometimes, you can't tie a reader down in tons of elaborate nonsense - I dislike 'flat' statements. Rather than an author telling the reader that his character is sad - there should be a description of features or behavior that allows our natural perception to lead us to that conclusion. A 'flat' statement can be used to clarify what a character believes another is displaying - but there should always be something to create an image.
"Naruto was shocked."
Should be:
"The blonde's hand froze, his brow raising. This is what she'd meant?"
Even though there are more words - the story actually flows more easily through a brief physical description to tie an emotion into and then reinforce it with a simple thought/expression. Otherwise, when someone says: "Naruto was shocked" - they have to 'compile' an image of what would be appropriate in the scene before moving on. In most cases, people just skip ahead until the words begin describing events and/or imagery.
"Flat" statements are "eye-gravel." You have to reduce speed to retain control over your vision of the story as you read. You can skip over them pretty fast if the plot is on the straight and true - but any course corrections and things get squirrelly at high speeds.
*sigh*... Only I could write an entire essay in response to a single sentence.
