My current novel WIP features a character that must remain nameless for the sake of it. Only in page 15 does he get a name. Note that by "get" I mean quite literally - it is not his actual name, but it is how he is referred to. That being said, the name he get will not be incorporated into the narrative until page 25, where he is referred to, as a character, by his given name. There are entire novels featuring characters in this form. The Alchemist features Santiago, whom from very first sentence is referred to as "the boy" until the very end final sentence. That is not the case in my book. It is only temporary, but until that moment when the character gets a name, simply calling him "the boy" feels off to me. It feels as if the usage of "the boy" does not last short enough to be overlooked, but neither does it last long enough to be pleasantly transitioned. It's as if for 200 pages we'll have "the boy" and then suddenly, for another 200 pages, we'll have "Joe". We already got used to "the boy", only here it's 25 pages. The only solution I can dig up off the bat is to give the character a distinct feature, say, "The boy with the black hat." and abridged 70% of its usage to just "the boy." Any thought? Well, of course there are. Spill 'em!