>>715000869
most people used to argue that oathkeeper and oblivion should be sora's exclusive keyblades instead of roxas as they represent kairi and riku respectively but here is what people seems to miss out:
Roxas was always the one who was in between light and dark, well not him technically but who he takes his form from, ventus. since X, ventus was influenced by both light and darkness until xenahort was capable to split them and as result rest in sora's heart until he was merged with vanitas and got split again and seek refuge in sora's body once more, he was always entangled in this inside fight with light and darkness which was influenced in sora (having anti-form) and roxas (dual-wielding). roxas projected both ventus and sora's close friends by placeholding them with axel and xion but also him sharing 2 identities gave him the ability to dual wield and what better keyblade to describe light and darkness than with oathkeeper and oblivion, the promise to see his friends again and his will to enter into the unknown to keep his promise