[MangaD]

Well, he did say Eason and not Swordman Eason, and it makes sense that he unlocked a five-star hero since I'm in Act 7, unless he mistook Eason for his younger self (Swordman).

You always get a 3-star hero when you enter someone's code, no matter which act that player is on.

Sorry I meant Swordsman Eason. Why I only got this one hero?

You get a 3-star hero for entering a code. To earn more characters you need to play the game (usually you get one after you finish a tournament) and also share your code. Those who enter your code will give you a character when they finish Act 1, Act 3 and Act 5.