Ruby Hoshino/Relationships

Aqua Hoshino
Ruby's older brother. He is very overprotective of her sister; not wanting her to walk the same path that killed her mother. He is often called a "sis-con" by her and her friends due to this and the lengths he goes to prevent her from achieving her dreams. Often, she is hindered by his presence and is annoyed by his personality, as seen when he puts on a face when he first entered a dating show: these scenarios being incredibly off-putting for her and her colleagues.

As time goes by, he becomes more and more accepting of her sister's wishes and even went as far as to help them prepare for their gigs. He disguised as Pieyon to prevent any problems in coordinating their dances and singing. He and Ruby are closer than one might think, but not to the point where they aware of who was who in their past lives.

In chapter 53, Ruby is curious as to why Aqua was going home late every day. Melt informs her that he's been seen going home together with Akane for a while. Ruby becomes suspicious and tries to ask him about this before Minami warn against this. When Minami suggests that they are doing lewd things, Ruby is initially frantic but soon becomes serious as she cannot imagine her brother risking pregnancy with a high school girl. She adds that if he did, she would lose all respect for him.

By chapter 71, she sees a positive change in Aqua's demeanor after she offered to make breakfast for them. In chapter 74, she asks Akane on what her brother threatened her with to get such a beautiful person to go out with him, much to the eavesdropping Aqua's chagrin at being painted in such a bad light. She requests Akane to take care of her 'incompetent' brother for a long time after asking when they intend to get married and permission to call her big sister.

In chapter 106, after Aqua reveals their mother's secret to the public, Ruby's relationship with her brother is heavily strained. Her opinion of him deteriorates, as she believes he is a liar like everyone else. She even goes as far as saying that she can't think of him as family anymore.

Ai Hoshino
Ai is Ruby's biological mother. Even in her past life as Sarina, was a big fan of her and her work. She was elated when she reincarnated as her daughter, as she was able to get to experience her dream before her goal in becoming an idol. She was spoiled and demanded her mother's attention whenever she was around. She would utilize every moment to fawn over Ai so she could spoil and dote on her. When she was still alive, her mother reflects how similar she was to an Otaku after Ruby complimented her smell and asked what shampoo she used despite using the same ones. After her mother's passing, she was determined to follow in her footsteps and prays to her tombstone regularly to update her on her life.

Ichigo Saitou
Ruby's adopted father. After Ai's death, he became distant from his family. After becoming an idol, Ruby comes to him looking for anyone who was connected Ai. He promises to tell her if she becomes popular and provides some pointers on how to do so. He also helps her by using the connections he still has to get her bigger and more popular roles.

Miyako Saitou
Miyako was at first Ruby and Aqua's babysitter but then later became their adopted mother. Miyako never once tries to stop Ruby becoming an idol, even decides to relaunch the idol division of Strawberry Productions just for her to pursue her dreams.

Kana Arima
Ruby and Kana share a long history but only started interacting with one another recently when Kana joined her group. They met on the set of That Was the Start when they were just children and Ruby has a poor opinion of Kana due to her cocky personality. The feelings remain until they start attending the same high school. They often talk with each other about their line of work and due to Kana's infatuation towards Aqua, they are able to continuously banter on about him.

They both share the same dislike towards his personality and his unwillingness to do much. Ruby is aware that Kana is a talented actress and may go back to being one soon, and so, she takes her presence in their group seriously.

In chapter 74, Ruby is unfazed by Kana's rude remarks about her and comments how she's 'bitchier' than normal.

Mem-Cho
Mem is the other member of Ruby's newly revived idol group B-Komachi upon Aqua's recommendation. Initially picked up by Aqua after their performance in LoveNow: she uses her talents, experience, and notoriety for the group's fame. Despite being the oldest in the group, way past the ripe age for an idol, Ruby is accepting of her, as they share the same dreams, and still looking completely eligible for an idol. Ruby looks up to her and comments how she is a cutie when they first met. Both of them are optimistic hard workers, which only serves to further propel their friendship.

Akane Kurokawa
In chapter 29, Ruby sees her mother in Akane and subconsciously utters 'mama' after coming across a video of hers. In chapter 41, Ruby is seen following Akane's account since she was her brother's girlfriend. At that point, Aqua has told Ruby beforehand that they only has a professional relationship. This causes Ruby to ruminate how scummy guys like him are the worst for not taking a 'cute' girlfriend like Akane seriously. Ruby then vows to be nice to Akane when they finally meet face to face, hoping that day comes soon.

In chapter 74, Ruby is ecstatic that she finally met Akane in person. She is instantly captivated by her looks and praises Akane's beauty and cuteness. Akane returns the gesture while remaining humble, complimenting Ruby as someone much prettier than herself causing Ruby to beam in delight.

Ruby is elated over her praise and asks if she can call her 'big sister'. She shares how she always wanted an older sister and began questioning Akane on when she will marry Aqua so as to officially become her sister-in-law. When interacting with the enthusiastic Ruby, Akane could only blush in response. Ruby then earnestly asks Akane to take care of her 'incompetent' brother for a long time using the wedding vow phrase 'In sickness and in health'.

In chapter 77, Ruby is euphoric as she asks Akane to share a room with just her tonight. Akane agrees as she returns Ruby's embrace. Ruby begins signing merrily about the sleepover as they make their way back. Ruby then shares how familiar she is with 'this place' and how significant it is to her. She then invites Akane to join B-Komachi as well, but Akane is apprehensive as she needs much work to anything that’s not her forte.

Akane then asks if she’s interested in becoming an actress. She is happy to see they have the same interests and offers to guide her if she wants. Ruby is delighted but says she will do so after accomplishing her dreams of becoming an idol. Suddenly, she asks Akane on her views of an appropriate age gap. Surprised at the change in subject, Akane replies that it’s the mental state and age that matters the most to her, but she would be fine with a 10-year gap. The frantic Akane asks the reason for the sudden girls talk with Ruby chuckling in response.

Ruby confesses that she has a crush and the history behind said crush to Akane, stating 'sensei' gave her a purpose and without him, she wouldn’t be able to live on. Akane empathize and understands her feelings, stating that it's good to have someone she loves. Akane agrees that a little age gap won’t matter in the face of true love and that she’s willing to help her little sis to go on the offensive. Ruby was overjoyed but states that she's unaware of where he went.

Ruby trusts Akane enough to reveal all the embarrassing advances she once made only to be rejected. Akane could only blush in response as she listens to Ruby venting. Despite Ruby's personality change, she is still protective of Akane's and Aqua's relationship as she chastises her friend for aiming for her brother when he already has a pretty girlfriend.

Masaya Kaburagi
Ruby meets Masaya when she applies to be a reporter for Dig Deep! One Chance. Masaya, thinking about her chemistry with Aqua on the set as well as boosting the ratings of the show, gladly accepts. When Taishi wants to cast her for the role of Ai for the 15 year lie, Masaya, as the producer acknowledges her talents and looks, but believes that they should cast a more well-known star.

Taishi Gotanda
Ruby and Taishi seem to be long acquaintances through the latter's relationship with her brother. Noticing her strong resemblance to Ai, Taishi wants to cast Ruby in the film about her mother that he is making.