[Although it's true that there's nothing to be self-conscious about, Vergil cannot very well say that to Nero. Well, he can. But he's not exactly going to be believed.]

You will grow accustomed to it with time. [And if not with time, well. Vergil's certain it will not lack in...appeal for others. At least that's been Vergil's experience. But that's something for Nero to discover on his own, and not to be discussed between father and son.] For what it is worth, however, I believe it suits you. It reflects your demonic heritage. You bear traits similar to me and your grandfather. But it still reflects your humanity.

[Which, yes, is because of his human blood, but Vergil chooses the word humanity to describe it instead for a reason.]

It is both your power and your strength made manifest. I see it as something to take pride in.