@helpfulcomrade: Ok, first off? Quit insulting me. I didn't insult you, only pointed out that you're looking at things from a narrow scope, not the full picture. I also complimented you on being an Eve fan (supported it, even) and agreed with you that they're freakin' cute together. You bashing at me and insulting me is the more troll-like behavior since you've done nothing to counter my points, only insult them. You're better than that.
Second off: "Ibusuki may not want to destroy Eve, but she still wants to remove her from her path to Tarou, and it's out of her own selfishness."
This right here is what I mean by a narrow view (I repeat NARROW. TUNNELED. Not incorrect, not wrong, just INCOMPLETE. I can't stress this enough!). You're only looking at it from their relationship level. You need to remember that Ibusuki's ultimate goal is to get rid of seeing FLZs completely. Plus, she's been doing her own investigations and mission "behind Tarou's back" loooooooooooooooong before they reunited back in Chapter 1. She doesn't need his permission to continue doing this any more than Tarou needs Ibusuki's permission on keeping Eve around. They agreed to cooperate to help with Ibusuki getting rid of seeing FLZs. Anything past that is their own personal problem.
Please note I never said you were wrong about Ibusuki having ulterior motives about her desire to get back together with Tarou. I've only been trying to say it stretches more than that. Chapter 140 is proof that she wants to separate Eve from Tarou, sure, but that she also is still on a mission to stop seeing FLZs. Until now, you also claimed he tried to eradicate her, but as I've proven (Chapter 140 again), that was the father's plan (Chapter 132, and 133 where he loosely explains the FLZ in a negative format). He's only wacky about his wife and daughter, but don't ignore the cold reception he gave both his sons (Chapter 131). He's got a beef with the FLZs and while he's hardly a primary antagonist (honestly, I don't think this series really has any), it's clear he's going to be a problem about it.
"Add to the fact that she's doing this behind Tarou's back and recruiting his friends and family to help her, and it's clear that she's become the primary antagonist in the story."
Again, you're dead-wrong and I'll go into more details for you. However, I need to amend my statement as we are BOTH wrong about Tarou's sister. She was never recruited: she got herself involved by her own investigations, interrogated the father and got the rest of the information from Ibusuki (Chapter 137. Ebino for 138). Still, if you read Ibusuki's explanation, not one word is manipulated or out of place. Jump to Chapter 140: Again, nothing but honest answers from the sister's questions, even clearing up the misunderstanding on how Eve looks. It was even the sister who called out that Ibusuki was still in love with Tarou, so it's obvious she's not being manipulated. She self-recruited herself to get answers as well, same as Ibusuki.
Same with Ebino on Chapter 138 and 139. Ebino was the one asking the questions and Ibusuki answered them and even defended Tarou's love for Eve on Chapter 139, also viewing her as more than just an FLZ but another girl. Ebino was the one to tell Ibusuki that she shouldn't just accept things as they are and take action, with Ibusuki following up she's working on a plan to take care of this issue. Plus, if she was recruiting her, why would she have told her to keep pretending like she knows nothing to Tarou? That defeats the purpose of "recruiting" someone and "manipulating" them.
As I've proven (I've even pointed out the chapters for you, so I hope to god you'll stop insulting me and calling me a troll now!), Ibusuki may have ulterior motives, relationship-wise, but she's by no means an antagonist. If anything, as someone much more experienced with FLZs (another fact we can't ignore), it's shown that Tarou's love for Eve is unhealthy and mentally detrimental. This is the reality of it. From the beginning Eve was never going to have a happy ending, we all knew that. We just gotta enjoy the ride before her time comes. The one good news is that Ibusuki isn't planning to kill Eve. We don't know her master plan yet, but we do know that it involves her and Tarou to end their relationship. Believe me, I get it: It sucks because she's such the perfect girl, but a delusion is still a delusion. That's also a fact. Personally, I hope that Eve will disappear into Ririsu and gets "reborn" into their daughter.