He turned fully to face Yohji, but the stare didn't waver. If anything, it grew a little sadder as Yohji continued to ignore him. Didn't Yohji realize, didn't they all realize that he just wanted to help them?

And didn't Yohji realize that Omi had never given up that easily?

One of the odd byproducts of being raised to accomplish the mission at all costs, most likely. It did tend to make a person somewhat more stubborn. "Yohji..."