I was walking near and read it all through. I think I have something to add to Coma's and something to say myself.
About Zenkichi. He isn't as simple as Coma said, if that would be true, that won't be Medaka box. Actually the conception of this character isn't unique: there are thousands of guys who are just "normal Japanese schoolboys" , in thousands manga, who are trying to "save/protect all their friends/girlfriends/and their pets" from thousands enemies so it really makes sick. So what is so special about Zenkichi if he is so casual? A few very important things. First of all he is unbelievably strong-willed person, he do what he decided to do. At this point he can even compete with Medaka and it is the main reason he could caught up with he for such a long time. Speaking frankly, if to think about mental preparation, then he is the strongest in manga, where everyone would give up he won't.
I even can say that he is a real warrior, what I can hardly say about any other characters of his class( just remember his seppuku). And he also posses any good quality a normal human can held. Practically an etalon of man, and still he is just a normal man you possibly can meet on the street, with his own human fears and wishes and not a superhero or even a "prince" like Kouki. And I can't not to mention his leader's qualities, which Medaka don't posses: she is a solo-player while Zenkichi is a command one. Yes, he "get along with everyone" but this give him opportunity to understand people and to unite them in command. And that's why it seems to me he may be a good husband and a father.
And all of this is composed together into a one man, but still he looks looks like alive and "warm"? From my sight it's really amazing, and his personality is also something interesting you should think about, but he may seems really casual from the first sight because he is the only normal person in this insane asylum called Medaka box. Everyone else has some disturbs in their personalities that makes them bright and colourful that Zenkichi just fades on their foil.
You said everything right about Shiranui. She was playing roles so long that now she can't understand her own feelings.
But, please, tell me what is this thing:
I was searching through a lot of sites but I didn't find anything about this decease. Don't tell me you just made it up or you anime-psychologist career will end right here...
OK, but anyway I have a question for you. Why do you think Shiranui taking so easy and irrelevant that she will become new Iihiko, which is actually equal to her own death? That is a hard question for me, I have some theories abut it, but I've found all of then way too stupid and far-fetched.
Yeah, i agree. What was missing from what i said, you put perfectly. Warmth. That's the thing that differentiates Zenkichi from other protagonists. In Medaka Box, the role everyone plays is pretty well defined. The Perfect Girl; The Bishounen Prince; The Girl-Next-Door; The Overconfident Villain. Shiranui and Zenkichi are interesting because every pidgeonhole you place them in, they don't fit. You expect them to go right, they go left. You expect Zenkichi to stay by Medaka's side, he fights her. You expect it to be physical, instead its mental. You expect him to lose with grace, he wins by a landslide. You expect him to live happily ever after with his Childhood friend, and he chooses the moral highground through loneliness.
Why?
Wll, its complicated, but then again its not.
He's got life in him. We all have lots of sides. And while every time we expect Zenkichi to dip below the moral side, to be selfish, to be a jerk, to be mean, he sets it up like he finally will...and then, all along, he doesn't. He's a foil to the whole events of Medaka Box by being so relentlessly upbeat through his plight.
He's just so nice, so suprising.
To the people who prefer dark heroes, they have Kumagawa, who while sometimes is even more unpredictable, can be too predictable too.
And @hungryman, my title survives, i just phrased it wierd.
Basically, Shiranui has a self-image problem.
She sees herself as smarter than everyone else sometimes, sometimes she thinks that she is the worthless person in the room.
But right now, one thing doesn't change:
In her eyes, she was born inferior. Its like if Medaka was her older sister. While Shiranui got a small frame, turned out not to be as popular, couldn't get along with people except one, and that person is Zenkichi, the person she loves. And even HE loves Medaka. Its like Shiranui is Medaka's prototype. Everything Shiranui can do, Medaka can do better.
And her role to this person that makes her so inferior...Is a slave. Even if she wanted to break off and define her own personality and interests, she can't, because of her job. Its sad, really.
Its like if you were born into a family as the ugly younger brother. While your handsome older brother got straight A's, you struggled and got average girls. While your brother had a new girlfriend every week, the one girl you liked for years is obsessed with your older brother and only sees you as a friend. As you grow up, your brother gets into college, while you lose your way. Then, your brother becomes The first Astronaut/Cosmonaut to land on Mars, and you work at NASA as a janitor.
You would become bitter towards your brother, who was literally born with every advantage.
but the thing is, your brother would have had to work for those grades. Your brother might have hated the attention of all the girls. He might have struggled in college and worked blood, sweat and tears to get the Astronaut job. But you would never know in your bitterness, that everything was just as hard for him as it was for you.
In Medaka Box's case, we are seeing things through the point of view of the Successful Older brother. Shiranui is the younger brother, brimming with contempt, But like all families, they do love each other. Its just buried, you see.
Thats how Shiranui's view is warped. Hers is truly a sad story if you consider it. Maybe the most unfortunate person in this whole story. Except for the girl Minus, Shibuki.