Zack doesn’t seem to like women playing hard to get, so if they aren’t attracted at him, he simply moves on; never hits on them again. And it’s like Zack has bad luck in flirting lol–if you knew that kind of trope. However, the response he gets from Aerith is different.
At first, Aerith rejected his one date offer. He really thought she wouldn't date him, his response when he bought her the ribbon, surprising at how Aerith mention about his one date offer, "but you say the date is silly." But later, she takes initiative, "hey would you like to go to park?" And that’s how they go on their first date, almost kiss. It’s a win-win. They’re both attracted to each others and Aerith isn’t
passive girl (oh how hate I do towards her hater who thinks she's shy and timid in Crisis Core). Then Zack eventually always visits Aerith whenever he’s up to, spending time together,
Kunsel also notice this. That after Angeal's death, Zack always meet Aerith.
Hmmm, I wonder where you might be.Wait, let me guess...
You're hanging out with that Aerith girl again, aren't you?
I bet you're wondering how I got that information.
See, I know everything about you, even if you never tell me anything.
In other words, it's no use keeping secrets from me, because I know how to get information.
So talk to me, Zack. You can tell me anything.
Tell me about all the things that are wearing you down.
I bold the last line because this shows Kunsel aware Zack is not okay after that event, CCFF7R shows the bridge of timeskip between chapter 5 and 6 that he even questioned what he is fighting for. And Zack only feels healed by meeting Aerith; not only by the time she embraces him when he cries after killing Angeal. I believe that's when Zack started sending letters to his parents, telling them about him doing his best as SOLDIER, but he also informs them he had a girlfriend. A man telling his parents that he has a girlfriend means no other than him being serious with her, the one and only. I think this fact itself contradict the additional sequence of him saying on the back of the truck that implies him having multiple girlfriend although Aerith is not sure the girlfriend in the letter refers to her.
Doesn’t mean that he can’t have female friends, right? He’s still friends with Cissnei. Nah, Nomura, along with the Director of original Crisis Core, Hajime Tabata, said that the beach scene between Zack and Cissnei was made to allude to a scene in FFVII, where Aerith says something about Zack having other girlfriend.
── In the beach scene there’s a good atmosphere between Zack and Cissnei, but what’s kind of relationship did they have?
Nomura: "There was a scene in FFVII where Aerith says something about Zack having other girlfriends.”
Tabata: “It’s meant to allude to that. Besides that, she’s also one of the people who gave Zack support along the way. Some of those feelings are depicted in the DMW memory scenes.”
But Nojima, the scenario writer, confirmed that he didn’t intend to portray Zack waver between Aerith and Cissnei.
──Did you intend to portray Zack’s wavering between Cissnei and Aerith?
Nojima: “No, that’s not true.”
(CCFF7 Ultimania; interview section)
I think this is why, the scenario that is supposed to show Zack having multiple girlfriend shows how faithful he is instead.
This is also a proof that Zack having multiple girlfriend only exist in Aerith's Gongaga speech
We continued running the fan club after Zack's untimely death,
but we have to disband due to financial reasons.
We would like to share one last quote from a woman
who had a close relationship with Zack:
"My wagon broke, so I'm going to use a basket to sell the flowers.
I hope you can join me
when you're back from your tour."
She must not have heard what happened, which makes her comments all the more poignant.
Our thanks go out to all 109,348 members out there.
May Zack always live within our hearts.
Even Zack Fanclub know Aerith is the woman Zack being in relationship with.
I dont know what reason why Aerith doesn't think she's the only one. But if she's okay with that, no wonder she's also okay if she's not the only one for Cloud since Cloud loves Tifa.
Also, Zack is not the only character who is ladiesman or charming with ladies. Zidane is worse than Zack. But I dont see Cleriths hate Zidane end up with Garnet????
And if we talked about full retcon... then I bet we would get the full truck scene in Part 3---Idk why the full version doesnt exist in LO and CC, so it has chance Zack not talking about 'multiple girlfriend' anymore, but straightly Aerith by name. Though what I wish is Cloud is half aware how Zack want to return to her at all cost. Then making him feel more horrible that he couldn't tell Aerith how much Zack loves her.