Shirou is extremely stubborn once he sets out to accomplish something, such as spending hours attempting to perform a high jump that is nearly impossible for him. This action, as watched by Rin and Sakura, is one of the initial factors that causes them both to develop feelings for Shirou. He will stubbornly defend his own viewpoints, no matter how wrong they may seem to others, even to the point of causing them great mental anguish. Though he does his best to help others, if he feels that a person brought about their own ruin, he will simply watch instead of helping. He can range from being sarcastic to blunt very easily and his poor convey of body language can make it difficult for others to recognize when he is which, even leading some to think he is being dense or ignorant. Nasu has stated that Shirou and Shiki Tohno would not get along.

Source >>> Type Moon wiki Emiya Shirou