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|Eye color||Light brown|
Ruru (瑠々 Ruru) is Honoka's deceased best friend and the other half of her mangaka duo, who passed away from terminal kidney disease.
Ruru was a rather thin girl. She had mauve purple hair that was poofed out around her face with bangs swooped above her slightly thick eyebrows and medium brown eyes. She had freckles on her cheeks and a wide smile on her face very often.
According to her parents, Ruru was usually shy around other people. When she met Honoka she opened herself up and revealed that she has a very excitable and outgoing side. When showing her feelings towards Honoka, she even comes off as very outgoing and unafraid, highly contradicting to what her parents may have thought she acted like. Even when Honoka turned her down and forced her to do the rest of the manga by herself, she kept her determined and cheery attitude until her end.
Ruru was very close with Honoka, and began to work on a Yuri (or girls-love) manga with her. Ruru eventually fell in love with Honoka and sought a romantic relationship with her. Even though Honoka reciprocated her feelings, she feared the grief from Ruru's inevitable passing would be too much to bear if they became further involved. Honoka stopped their friendship entirely, leaving Ruru to finish their manga alone. After her death, Honoka blamed herself for forcing Ruru to work on the last chapter by herself, worsening her illness due to overwork and heartbreak.