Shirou Emiya from Fate/Stay Night. We are using Unlimited Blade Works Shirou, the one who's actually good at swordfighting.
Kirito from Sword Art Online.
Scenario A) Real world Kazuto, but with exact replicas of Eluciator and Dark Repulser. Shirou gets Kanshou and Bakuya but non of his defensive abilities.
Scenario B) SAO Kirito with his standard gear. In addition to his swords, Shirou gets Avalon and his weird UBW inner sword defense.