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Heitor's Gonna Hate was a virtual representation of one of Kassandra's genetic memories, relived by Layla Hassan through the Portable Animus HR-8.5.
Kassandra:Why are you so worried about a mercenary?
Heitor:He's a friend. Didn't I do the same for you? Remember that trouble you and Markos got into...
Kassandra:Yes, yes, you're right.
Heitor:If we're not going to look out for each other, who will?
(If players choose "I need to go.")
Kassandra:Time to go get your friend.
Kassandra travelled to the Rhamnous Military Camp, where she found the mercenary being held in a cage. After killing the nearby guards, she freed the mercenary and escorted him to the beach. There, she found Heitor with a boat.
Heitor:There you are! I was starting to think you wouldn't show up.
Himilko:You!
Heitor:Hello, Himilko. Long time.
Kassandra:Heitor, what's going on? Why are you here?
Himilko:Of course. He didn't tell, did he? You've been used, my friend.
Heitor:Shut up. I'm not here to hear you talk. I'm here to see you die.
Kassandra:You deceived me! You asked me to rescue him just so you could kill him.
Heitor:I didn't lie... just omitted some details, that's all.
Kassandra:I got him out as you asked, so why kill him now? I could have dealt with him if that's what you wanted.
Heitor:Because I had to see him.
Kassandra:Why?
Heitor:Because he killed the love of my life.
Himilko:We both shared guilt in that, but she was my wife!
Kassandra:Your wife?
Heitor:She wouldn't have died if..
Himilko:What? If I hadn't caught you? If you hadn't attacked me? If she hadn't tried to stop us? If our blades hadn't stryck her down? Who's to blame here?
Kassandra:It sounds like neither of you was at fault.
Heitor:He drew his weapon first.
Himilko:You were with my wife. What did you expect? It is my right to restore my honor!
Kassandra:It seems neither of you wanted to kill her. There are no winnders here, and neither of you has to die. Let it go.
Heitor:You're right. I'm sorry.
Himilko:Fuck your sorry, you destroyed my life that night. But I agree with your friend. Let's just pray we never see each other again.
Himilko left.
Heitor:Why you...
Kassandra:Let him go. You made the right choice here.
Heitor:Sometimes we cannot make up for the mistakes of our past. I'm just glad all those years with me didn't rub off on you.
Kassandra:Sometimes we need to move on from the past, like I did from Kephallonia. You have a chance to make a new life - use it.
Outcome
Kassandra helped Heitor to free his old "friend" Himilko, bringing him to the beach and learning more than she knew. She either chose to let Heitor kill the mercenary or migitate their grudge towards each other.
Trivia
An alternative dialogue can obtained if Himilko is killed before Kassandra reached the beach. However, Heitor's past with Himilko will not be revealed. Regardless, the memory will can be completed and Kassandra will still be rewarded.
The name of this memory is a play on the proverb "Haters Gonna Hate", meaning people who dislike something or someone will always find a way to keep disliking it, even when the reasoning makes no sense at all.
