Naitou Tohru is the protagonist of Hapymaher and the character whose viewpoint you share for about 85% of the VN.  He is a character whose personality and situation are defined by a sense of loss and guilt so painful, it has literally driven him to the brink of insanity.  Oddly enough, the thing I find most admirable about him is the fact that is self-aware enough to actually rely on someone (most of the time) when he is at his limits and outside his specialty (which is altering/controlling his own dreams).

A few words about his situation without giving away anything that would ruin the story.  If you know the concept of a 'lucid dream', you also know that it is a dream where you are aware you are dreaming (this often leads to you remembering more of it).  In Tohru's case, he sees nothing but lucid dreams... which means that the barriers between reality and dreams in his consciousness are extremely blurry and he is incapable of 'resting' psychologically when he sleeps.  He rarely, if ever receives what we would call 'restful sleep' without the aid of drugs that send him into utter insensibility, and in his dreams, he is capable of doing practically whatever he wants, in many cases. 

Tohru's character can sometimes be seen as a symbol of self-control - as I said in my post on Maia - because he really does have a ridiculous level of self-control for someone still in his teens.  He is not really that dense, though he often pretends to be out of self-defense.  However, he has a lot of psychological hangups even in real life that have reinforced his somewhat blurry view of reality... ones he actually needs to maintain his mental and emotional balance, even if he realizes they are ridiculous.

Tohru's clear-eyed view of dreams can be seen as a contrast to his somewhat blurry view of reality, as he is almost always the first to realize when he and the other characters are dreaming and when they aren't... and what the nature of the dream is.  To him, nightmares are everyday stuff, and he is so inured to the pain that accompanies them by experience that it would be tempting to see him as nerve-dead from the outside.

He does have his weaknesses, even in dreams, though... and their names are Saki and Maia.  He is heavily dependent on Saki (self-evident within seconds of encountering her) and... holds other emotions towards Maia. 

So what can I say?  In another VN, I might seriously dislike him, because he is too aware of those around him to be your standard harem protagonist, but he does have some seriously admirable elements... such as a sense of compassion and good Samaritan-ism (limited to women most of the time) or his willingness to endure pain for the sake of others.  However, he is also more than a little clumsy when it comes to handling those close to him and he frequently makes a wild boar look mild and easily moved.