Ruby Hoshino (girlfriend)

Ruby's mother, Ai Hoshino, has a star in each eye; Ruby inherited a star in her left eye and her brother Aqua Hoshino inherited it in his right eye
Later, his star dims and he gets an additional black star in his right eye after using dirty tactics to rise in the entertainment industry.

Ruby's greatest asset has been repeatedly cited as her immense natural beauty. Kana Arima also stated that she possesses a charisma that draws people in. Furthermore, her mother taught her to dance from a young age, and even Aqua Hoshino noted that she did indeed possess a natural talent. However, Ruby lacked arguably the most vital area for being an idol: singing; she only scored a mediocre 38 in karaoke. She also refrained from resorting to dishonest tactics, leading Minami Kotobuki to believe that Ruby was too "pure" for the ruthless entertainment industry.

Unlike Aqua, who is calm, calculating, and discreet, Ruby is the complete opposite: she is extroverted, outgoing, loud, optimistic, and communicative, unlike her brooding brother. This is most noticeable in the connections she makes with others. At the same time, Aqua only does this to further her own plans. She doesn't share her brother's opinion of pursuing the person responsible for their mother's murder; instead, she puts the incident behind her and focuses on her dreams. She persists in this idea to the point of conflicting with her brother's interests.

Ruby often speaks her mind bluntly, referring to Kana Arima as "pumpkin girl" and "the girl who licks a lying snitch," much to Kana's annoyance. Furthermore, Ruby has used her "airhead sister" image to her own advantage in the media, creating a persona of her own making to promote herself.

Ruby is a beautiful young woman of average height with orange-blonde hair styled in a side ponytail (just like her late mother, Ai Hoshino). She resembles her twin brother, Aqua Hoshino, and possesses pink ruby ​​eyes with a six-star mark in her left eye, like her late mother. As her idol career progresses, she also acquires a six-star mark in her right eye, which becomes a permanent feature once she begins to shine with the same intensity as Ai on stage. [10]

Many people have said that Ruby resembles Ai, as well as Aqua Hoshino and Kana Arima. Kana herself confirmed that her keen sense for the industry "senses this girl's potential," which reminds her of Ai. The resemblance intensifies when she wears a purple wig, to the point of surprising others, especially Akane Kurokawa.