Konoe Tsuruma (鶴眞 心乃枝/Tsuruma Konoe) is one of the heroine of the Kono Naka ni Hitori, Imouto ga Iru! series.
Konoe is a very sweet, soft looking girl with green eyes and light charcoal hair that reaches down to her buttocks with slight drills at the end and two small pink hair clips on the sides of her fringe.
Throughout most of the series Konoe is mostly seen in the school uniform with alterations. She wears a shirt with a high thrill collar. She also has pink tassels tied on the top of her high knee socks. She also ties a light grey big hair bow around the back of her hair.
Suiting her appearance, Konoe is an extremely kind and gentle girl. She is shown to care about the welfare of people around her (E.g when she confesses her worry about Miyabi's reclusive behavior to Shougo.)
However, as seen many times, Konoe can become fiercely possessive when it comes to Shougo. She and Miyabi basically entered a competition to see who could claim Shougo's love for herself.
A young girl who attends the same school as Shougo and also the first friend he makes on his first day of his new life. Very curious and believing in destined meetings, she is in the same class as Shougo as well as the class representative. She loves creme puffs. She revealed later that she was Shougo's childhood friend and feels responsible for the accident which landed him in hospital. She has the same phone as the mysterious shadowy figure shown once calling Shougo. It is later revealed that she was also the one who sent him the cake, photo, and action figure on his birthday. She initially called him using the voice of Perin a character from "Transforming Warrior Granberion". She is in love with Shougo. This fact is enforced when she tells Shougo, "When we were kids, I wanted to be your sister. I figured we could be together forever that way." The phone she used was a prototype developed by her father with a rare voice changer feature. In volume 8 of the novel, she becomes Shougo's lover but it is also revealed that she is Kumagorou's illegitimate daughter. However, in volume 9 it is discovered that Shougo is not Kumagorou's biological son and thus she is not really Shogou's sister.