Straightforward and Intimate
Our author sure isn't trying to hide anything, and with his straightforward sentences, it's pretty clear that he really wants us to understand what he's trying to say. Since he's writing about some pretty complicated and dark parts of history—plus parts that have been denied by the Turkish government—this style is the perfect fit.
But it's not just that Vahan wants us to get what happened to him, he also wants us to know how he felt about it—at the time and now. So not only is the point to paint a clear picture of the genocide that happened to Armenians, but also to convey the experience of someone living through this terrible time in no uncertain terms as well. This brings us to the intimate element of the writing style—knowing Vahan, after all, only helps us care and appreciate the horror he encounters.
Vahan shares a bunch of emotions and reactions with us that no one else knows about, not even his family. Remember when he's first describing himself? He tells us:
My father was afraid that I lacked character and discipline. And he was right. As far as I was concerned, character and discipline were consolation prizes given to the meek, the unadventurous, and the unlucky. (1.5)
Do you see how honest he is with us? He doesn't try to dupe us into thinking that he does have these qualities; instead he calls it like he sees it. This means that we really appreciate how much Vahan is forced to grow up, that we appreciate the vividness of his fear and loss and understand just how far he comes by the time he reaches Constantinople. He is upfront and straightforward about his life, so even when no one else knows his truth, we get to see it up close.