As expected of B-PROJECT's prince he treats Tsubasa like a princess. He is very kind and overly generous to her, often wanting to buy her something on the whim. Tsubasa is mostly shown to feel a bit uncomfortable when he goes over the top with his generosity. She then changes the topic to put a stop to this situation.
Surprisingly, Tomohisa becomes selfish and childish in Tsubasa's presence. In many of his card stories he muses on how he'd like to see her in specific clothes such as a kimono in his SSR「New Year」or wants to do something together, adding the sentence "Would you allow me to be selfish?".
As he grew up in an affluent environment, he lacks knowledge about the common life. Tsubasa often times is perplexed anew at the gap between the princely leader and rich child. She then takes over Ryuji's task to teach and explain him the things he does not know yet. His SR「Snow Rabbit」is a good example. Until then snow bunnies were unknown to him. So she showed him how they are made and he was very pleased about it.
However, as lost as he looks when being presented with the common life, he has extensive knowledge about those things he loves and takes big interest in, such as the stars and gems. In private moments he talks about those interests to her and tends to compare her to them. 
He also tends to flirt with her but his flirting differs greatly from Kento's. It has a more playful and tender touch. Same goes for his teasing. Ryuji and Tsubasa are frequent subjects of his kittenish remarks. Sometimes he gives off comments that are meant to be innocent but there are also times where it is not clear if those were unintentional or not, thus confusing Tsubasa.
Besides this, he has shown concern towards her on many occasions. In both season 1 and season 2, as well as in the game he pays close attention to Tsubasa's health condition. He does not want her to overwork herself.
Ryuji was one of the members that doubted Tsubasa’s capability when she was first introduced as their A&R. As someone who is critical of himself, he expects no less of others. His Kizuna story 1-3 and Season 1 depict well how he slowly warmed up to her and came to appreciate Tsubasa’s presence.
Ryuji’s card stories are often about his love for sweets and fashion. After all the time they spent together she is prepared for the times when he is craving some sweets, hence she always carries his favorite lollipop with her. It also has become clear that he enjoys talking with her about fashion, even trusting her to pick out clothes for him at work.
Like Tomohisa, Ryuji enjoys picking presents for her, as a thanks for her support or just because he felt like it. Tsubasa greatly admires Ryuji’s passion and the things he does to be at his best. Her genuine compliments often bring a blush to his cheeks but it is obvious that he is happy about them. Though, he makes her speechless as well with his flirty approaches sometimes.
Another recurring theme is their mutual support of each other. Despite his harsh words, he tries to cheer her up in his own way. 
When she started out, she didn’t know yet how to respond to those comforting words hidden behind a rough tone but now, Tsubasa finds comfort in them, especially coming from Ryuji. And even though it is Ryuji who encourages her most of the time, Tsubasa too has a positive effect on him. The rare times he doubts himself or is unsure about something she is always there to give her honest opinion and shows him again what she thinks are his assets.
The relationship between Goshi and Tsubasa started out rather rocky as Goshi didn't have much trust in the newcomer Tsubasa was. He didn't think that she was even able to memorize all of their names.
A returning and most important subject of Goshi's card stories is music. It was made clear that this is his passion, the one path he wants to go in life. It is exactly this passion that brought that builds a connection between Tsubasa and Goshi. Both share a strong love for music. Even though she is not as well versed as Goshi, she is someone he likes to exchange opinions with about the newest releases of CDs, headphones and other things related to music. Tsubasa admires and respects him for his vast knowledge of music.
They often times share a moment alone together, albeit unintentionally and much to Yuta's and Kento's dismay. The latters usually complain that Goshi monopolizes Tsubasa as they are often seen or found out to have spent time together because of their common interest.
Initially, Tsubasa was hesitant to talk to Goshi as he emitted an unapproachable aura. But she learnt to deal with his mood and read his behavior.
His SSR「BIRTHDAY PARTY」highlights best how their bond developed emotionally. In the story Tsubasa stops Goshi from rejecting an important offer. She now can confidently support him with the right words.
Overall, the atmosphere around them became more relaxed. As a result, she does not have much reservations anymore when it comes to physical contact. The latter card stories of Goshi show her being more assertive which causes Goshi to blush frequently. The same applies to when he is met with her genuine expressions of admiration or thanks towards him 
They are comfortable enough with each other for her to find slight joy in scaring him  or chuckle lightly at his denial about some things.
Yuta and Tsubasa’s relationship has been on a friendly term since she started as their A&R. His open personality makes it easy for people to get acquainted with him. He quickly welcomed her into his inner circle of friends. She takes up the role of the big sister in their relationship.
Besides his love for sweets, there is another recurring subject in Yuta’s stories, his self-doubt. The more time passed, the more Tsubasa came to understand that he is not always the cheerful guy he pretends to be in difficult situations. As such she became an important source of comfort for him. At times when he is down after he got lost again or messed up she tries to cheer him up. Unlike his teammates, Tsubasa meets him with kindness and encouraging words.
An important moment of their bond is depicted in the game’s Main Story Season 1, Story 3: Love’s Whereabouts. Goshi and Kento have a big fight, Yuta as usual tries to lighten up the heavy atmosphere but it backfires. The former two don’t mince their harsh words which greatly hurts Yuta who runs out of the apartment. Tsubasa runs after him and he opens up to her about his lack of self-confidence and act of concealing his insecurities. He asked if she could hold his hands and speak encouraging words to him. He also asked in other occasions as well.
Though just like his title of a ‘Carnivore Sheep’ says, he has a mischievous side to him that throws Tsubasa off-guard sometimes. He gives her comments like ‘I want to be petted by Tsubasa-chan as well.’ (SR「 Copycat」) or ‘If it’s with Tsubasa-chan, I don’t mind getting lost again.’. This stands in contrast to the times he genuinely tries to get her attention by acting cool.
It has been hinted on a few occasions that he might harbor romantic feelings for her, most noticeably shown in Season 2, Ep. 5 「KICK OFF」 where he tries to win the opportunity to go on a concert with Tsubasa, not knowing that everything is based on a big misunderstanding.
Kento and Tsubasa's relationship is perhaps the one that changed the most, noticeble mainly in the game. When she was introduced as their A&R, to him Tsubasa was like any other woman Kento associated with until then. But over time this steadily changed.
Despite the subtle shift in their relationship, Kento's flirty attitude towards her stays. He often tries to get a "reward" from her, in the form of hugs or kisses, for the work he has done. Rather than being charmed, Tsubasa most of the time is perplexed and lost when he makes advances to her. The situation is either interrupted by another member or she runs away. However, as time goes by she learns how to handle these situations, resulting in a much more relaxed relationship between both.
Aside from his friendships with the other members, his bond with Tsubasa is also important as it slowly reveals the complexity behind his understanding of love. In S1, Ep. 9 he confides his hidden feelings to Tsubasa. Due to the lack of affection in his childhood, presumably by his mother as was shown in Ep. 9, he grew up without knowing what love means thus mistaking simple, romantic relationships as love.
Those complicated feelings are a recurring subject in his card stories and in the game’s Main Story Season 1, Story 2: THRIVE’s Love where it takes center stage. When with Tsubasa he recalls his childhood, mumbling about it or becoming lost in thoughts. Good examples are his SSR「Flower Garden」, SSR「Sparkling Town」 and SSR「Lost Child」 where it becomes apparent that behind the confident act lies someone who craves honest affection.
At some point Tsubasa managed to break down a bit of the wall Kento built around himself. They are comfortable enough for Kento to consult about problems with her and stop the playboy act for that moment. He all too often is genuinely surprised at the different reactions she gives him for his advances and actions. Unlike the many women he kept company with she didn't give in to his charm yet.
Besides the romantic aspects of their bond, Tsubasa became the one person that he goes to first when it is about his precious bangs. Her opinion is very important to him. They also have tea as their shared interests. Both are found to often drink tea together and talk about new tea flavours.
The more time passed the more Kento lets his guard down around her, acting unusually childish and whiny. She even tends to tease him about his clumsiness. Overall she shows him kindness and understanding, almost appearing like a mother for him.
Kazuna and Tsubasa have a relationship build on trust and respect. He always treats her in a polite manner and regards her as an equal.
His SSR「Honest Feelings」reveals that he is currently not interested in romance since his career takes first priority. Despite that statement it has been vauguely implied on different occasions that he holds some affections towards Tsubasa.  One of the recurring subjects of his cards are their chance encounters. They make clear that he enjoys her presence and likes to spend time with her. However Kazuna can be sly at times as well. It is best shown in his SR「Glass Tree」 where they both go Christmas shopping together. At first it looks like a coincidence but he later asks her to keep it a secret from the other members. Usually Kazuna doesn't mind sharing with the other MooNs members but at those moments he tends to become a bit selfish to be alone with Tsubasa. Though, there is also a bashful side of him. He sometimes reacts awkwardly and blushes when being complimented by her.
An important aspect of their relationship is Kazuna's comfort in Tsubasa's presence. He tends to lose confidence in his proficiency and doubt himself during a job. Because she knows about this habit she often reaches out to him, asking how he is feeling and what his thoughts are. Tsubasa tries to encourage and support him the best she can. Her words help to lift his spirit. Sometimes, she teases him a little for being a worrywart.
In the beginning Tsubasa was insecure in how to speak to or interact with Momotaro. His SR PARTY NIGHT depicts quite well how she initially had difficulties reading him as their talk didn’t carry on and ended in silence after exchanging a few words. But when she was alone with him Tsubasa quickly noticed that Momotaro shows concern in his own way and that this taciturn attitude was not in particular against her, but acts like this with everyone.
It takes some time for Tsubasa to be able to read Momotaro; there are still moments where she is unsure about what he thinks (e.g. SSR Wish). However, Tsubasa slowly becomes someone Momotaro can confide in about various matters. For example, she is the first person he went to ask for advice on what to do in one of Kazuna’s kizuna stories when the latter behaves strangely.
There are also times where Tsubasa acts as some sort of a balance between Momotaro’s down-to-earth self and overly passionate self that even forgets reality for a moment (e.g. SSR BIRTHDAY PARTY).
Their relationship reaches a more relaxed status quo that allows Tsubasa to call him 'Momo-kun' or the latter even teasing her. In rare, but very personal moments such as his SSR Wish Momotaro, just as much as she does for him and the other members, cares for her wellbeing and wants her to keep smiling.
Akane has been on friendly terms with Tsubasa from the beginning. She finds it easy to talk to him because of his open nature. The same goes for Akane who feels comfortable when she is around.
Even though he is the oldest of KiLLER KiNG and acts mature, he often behaves child-like in her presence, a proof of how he feels at ease with her. In relation to the aforementioned, Akane sometimes tends to be a bit more reckless to appear cool in front of her.  He easily blushes and becomes shy when complimented by Tsubasa. As much as she cares for Akane’s well-being, so does he for her. In his SSR Surprise he is worried that she doesn’t eat properly due to her stressful schedule. So he wants to prepare her favourite dishes. In that manner, he often buys her small gifts as a thank you for her constant support.  Akane also likes to consult with her about difficult things or thinks of her often times, for example during New Year’s where he wished Tsubasa went with KiLLER KiNG to the shrine visit and has her in mind when they talk about a person that takes good care of people.
There have been small hints that he has a crush on her, albeit unconsciously. They are scattered throughout his cards, with his SSR BIRTHDAY SWEETS being the strongest indicator so far. The card shows that Tsubasa holds a special place in his heart apart from his friends. Because of work she was not able to attend his birthday party. Because of this Akane was all the more happier when she visited him the next day and could have his second party, just with the two of them.