Farhad was not the same after coming back. After the funeral rites were over, Fahna kept an eye on him. His cowardice, fear, and inferiority that had been innate to him were gone. Like it never existed in the first place, he talked to Fahna with his head up, matching her eye level.
Spoke to his mother without any shame that was caused by his incompetence. And when alone, he was always lost in thoughts, sometimes scratching his flesh in an attempt to feel the pain, which had almost turned alien to him.
In his mind, the word "maybe" kept appearing, hoping for his life to be back, hoping for a normal body. Though it was impossible.
It was due to all of this, that Fahna believed this was not her brother, but something else. Which won't be that odd considering the information she was able to obtain from my resources and what actually happened in Durum.