In Season 1 Episode 15 of Arrow, Oliver Queen is having a flashback where he sees someone who claims to be a student...He leaves him, though it is heavily implied that he's trap.
Is this person's identity, or even just fate ever revealed?
Yes. He is later revealed to be
He shows up again when
Oliver finds him working as a radio/communications tech.
His final fate
comes at the hands of Shado, who snaps his neck.
Note: I don't recall him ever being named in the show, but Wiki identifies him by name.