Okay, this was just revealed today. Four new characters have been unveiled for Season 3, my guess is that the names given are aliases for who they really are like Lisa was for Sara Lance, I want everyone's opinion on who you think they are:
‘DANIEL’ | Though Daniel could be a fake name to throw off spoilerholics, this 20something gent — a major recurring character for Season 3 — is a handsome, enigmatic and highly intelligent entrepreneur developing groundbreaking technology. (Picture a business magnate in Ryan Gosling’s body.) Though exuding charm and confidence in public, he privately harbors a tragic past that will drive him to become a tech-powered superhero. Watch for this formidable fella to be a love interest for Felicity and a rival of Oliver’s – both personally and professionally.
‘SETH’ | A well-educated criminal with grand ambitions and a knack for chemistry, this potentially recurring character gains power over his enemies by exposing them to a drug that drains their willpower. Oh, and he is very much a physical match for The Arrow.
TOSHI | Majorly recurring in (at least) the Hong Kong flashbacks, Toshi will serve as Oliver’s teacher and handler, and eventually become a friend. A well-trained operative, skilled in weaponry, combat and intelligence gathering, he is also a devoted father and husband.
AKIKO | Toshi’s wife is another of Oliver’s Hong Kong caretakers, and is herself highly skilled in martial arts.
This is the link to follow: