While Nerine's nickname, Rin, and Rin Tsuchimi's given name are the same, the two are generally differentiated by the honorific titles they are addressed by. Nerine is referred to as Rin-chan, while Tsuchimi is addressed as either Rin-kun, Rin-sama, or Rin-dono. However, Tsuchimi is also called Rin-chan by some, such as Asa, so context is the most important factor.
Nerine is named after the Nerine samiensis, also known as the diamond lily, a species of flower bearing plants of the Nerine genus native to South Africa. In hanakotoba, (the Japanese language of flowers), this flower has connotations of "happy memories".
In the normal timeline, Nerine is the daughter of Forbesii and Sage. However, if the alternate timeline is caused in Tick! Tack!, her mother is Ai. The alternate Nerine has reddish hair and an opposite personality to that of the normal Nerine. In both timelines, she is also Cineraria and Eustoma's niece and Lisianthus's cousin.
Nerine's story arc, overlapping with Primula's, begins with the introduction of Nerine's clone, Lycoris.
Nerine, throughout the series, tries to improve at cooking, but the only item she can make are omelettes. Nerine is very determined to get better at cooking, which she thinks of as her weakest and most unattractive point, so she can make more food for Rin. Initially, Nerine often becomes depressed when seeing Rin with Sia, but after her confession to Rin about Lycoris' identity and her own love for Rin (which had blossomed during her effort to fulfill Lycoris' last wish), she no longer becomes depressed, as she realizes that she may never win Rin's heart.
Nerine joins the school-broadcasting club and has made new friends at her school. She tells Rin that she will keep on loving him, but will not let that interfere with her own life.
Lycoris is physically different from Nerine in that they have different eye and hair colors.
She is named after the Lycoris genus, which is very similar to the Nerine genus. In a direct opposite of Nerine's name, Lycoris means "sorrowful memories" in hanakotoba.