As a Wild Mass Guessing subpage, all spoilers are unmarked as per policy. You Have Been Warned.
Out of all of Kaguya's suitors, three tried to give her fakes, one gave up, and the last one—the one Ishigami is named after—got severely injured/killed on his journey.
Given that Ishigami's name is a reference to the fifth suitor and Tsubame means swallow as the statement above is this foreshadowing that Ishigami×Tsubame will become canon since I don't believe Kaguya and Miyuki's relationship will end on an unhappy note like the Princess Kaguya's and Kaguya is out right helping Ishigami with his goal unlike Princess Kaguya. And Miko will have to deal with her heart break
- Jossed. Tsubame rejects Ishigami's confession.
- Her constant attempts to always hang out with Maki, do the same hobbies, and even copy her fashion sense.
- While she agrees to go out with Tsubasa, she admits several times early on that she isn't sure she likes him back, and he's usually the one to try and move the relationship forward while she's more often the more passive of the two. She might only be dating him to keep him away from Maki.
- One of the few things she encourages him to do is dye his hair and talk more casually. His new hair color is very similar to Maki's, as is his informal speech pattern.
- Her jealousy when it appears that Tsubasa might be cheating on her with Maki might not be towards her boyfriend being unfaithful to her, but rather the fact that he was doing so with the object of her own affection.
- Similarly, Ishigami sensing menace from Kashiwagi after she found out that he and Maki were friends, as she might not be pleased at the appearance of another romantic rival.
- Kashiwagi choosing to dance with Maki at the bonfire, including admitting right out that she considers Maki more important to her than her own boyfriend.
- This would be interesting if it wasn't shown that Tsubasa and Kashiwagi have become very intimate with each other. She french-kissed him after he gave her a gift for their anniversary, they might have gone all the way already and Kashiwagi is also still getting advice about Tsubasa.
- Based off the talk in chapter 138 Nagisa enjoys rather active sex life. If we were to take her words at face value when she spoke about the timeframe between her first kiss and first intercourse, then she and her boyfriend enjoy casual sex for a few months already.
- This does not exclude the possibility that she is Bi. While she's definitely intimate with Tsubasa, she's also shown signs of being attracted to girls. She's fine with kissing Hayasaka, and all the signs about her liking Maki definitely means that she does swing that way sometimes.
- This would be interesting if it wasn't shown that Tsubasa and Kashiwagi have become very intimate with each other. She french-kissed him after he gave her a gift for their anniversary, they might have gone all the way already and Kashiwagi is also still getting advice about Tsubasa.
- In Chapter 144, her thoughts describe Ice Kaguya as a "a scathing version of Maki" and is also mentioned that interacting with her gives her butterflies in the stomach.
Whatever the case, Tsubasa is going to end up in the Mexican Standoff version of a Shotgun Wedding scenario, with both of the girls' families demanding him to take responsibility while half of his own family pays Side Bets to the other half because they saw it coming.
- They were fellow Student Council members prior to the start of the series.
- Momo was the one that gave Shirogane the idea of challenging Kaguya in other to stop being invisible to her, which he did by declaring that he would score higher than her in the next round of exams and following through with his boast.
- Shirogane enlisted her help to gather the heart-shaped balloons for his Grand Romantic Gesture at the Culture Festival by simply answering to her refusal with "so ungrateful", implying they have more history than what it has been shown so far, and that Momo owes him big enough for those two words to be enough for someone with a Hair-Trigger Temper like hers to just acquiesce like that after hearing them.
- Momo is the president of the Astronomy Club, and Shirogane simply absolutely loves the subject, which so far has only really come up once during the moonviewing chapter.
Hard to tell what role Momo will play, but this seem like an awful lot amount of prep work for the author to not plan on using it somehow, someday.
The most likely candidates for Shirogane's false girlfriend are Hayasaka herself because he ended up presenting himself as her ally to the rest of the Shinomiya Family during the school trip, or perhaps Fujiwara because the school already thinks there's some sort of Love Triangle between them and Kaguya from the almost Love Confession from right before the reelection.
- Also to note, it is also possible that Mikado's entrance to the 3-A class in the third semester was to mislead the readers into seeing him as Kaguya's love rival of sorts.
- Confirmed for Fujiwara's part! When Kaguya confided to her that she and Shirogane were dating, Fujiwara at first accepted it in Chapter 222, only to retract her statement a chapter later out of disbelief due to her trauma of training Shirogane to cover up his weaknesses. She even compared their relationship to Netorare at best and refuse to acknowledge the two as a couple.
- If Fujiwara is willing to go to the deep end, then will take the option of siding with the Shinomiyas, especially Oko for that matter.
- For someone with similar mindset, then Erika is most likely due to her Idiosyncrazy for Kaguya alone, as she is like Fujiwara in one chapter, rejecting the notion of Kaguya having a boyfriend. If this happens, then her best friend Karen will side with Shirogane, wanting to protect his relationship with Kaguya and thus further straining the relationship of the mass media duo.
- Jossed. Fujiwara, while against it, came to accept the relationship after seeing that Shirogane started to improve on his learning skills after trying to teach him ballroom dancing within one chapter.
- That would explain why Osaragi claims she wants Ishigami to end with a good girl, but never considered throwing herself at Ishigami rather than making complicated plans for him to get Tsubame.
- Also backed by the official doujin, which has a chapter with Osaragi lusting about Iino's body.
- Jossed. Ishigami spend the entire summer in Switzerland.