Kotonoha Kanade (奏 言葉, Kanade Kotonoha) is of the supporting characters in all incarnations of Rikei ga Koi ni Ochita no de Shōmei Shite Mita. She is a 4th-year undergraduate at Saitama University who helps Himuro and Yukimura. While she often has no idea what’s going on with them or why they’re acting so strangely, she's usually happy to help. She tends to seesaw between excited and insanely frustrated based on how much normal emotions and rationale versus convoluted “logic” are favored in the situation that she happens to be in.
Kotonoha is a young sweet woman with light rose short hair and blue eyes. She usually wears a lab coat and school uniform-like skirt and has a flower hair pin on the left side of her hair.
Her love for mathematics and puzzles, made her develop feelings for her teacher in high school and that made her study even hard to get his attention. Following her math love, she decided to continue studying in the Information section of Saitama University Science and Research department.
She often can't understand what her co-workers Shinya and Ayame are doing and usually get mixed in their love experiment. But as they misjudge and interpreted a situation and fail to see the obvious thing, she will use the moment to sneak out and not get caught in their arguments and thoughts. Even though she often can't understand them, she would be happy to help them if they need her.
Kotonoha came to work at Saitama University and as she entered she greeted Yukimura Shinya and Himuro Ayame, but as they were too busy and excited about their love experiment, they didn't even notice her at first. Hearing their conversation and experiment, she was a bit shocked at what they were doing. As they later explained the situation and asked her how does she loves someone, Kotonoha showed them a manga with kabe-don situation and told them that her heart rate increases in such moment. Hearing that they conducted a kabe-don experiment, but once they starting included other hypothesis, she decided to make her leave and let them in their experiment.
On the next day, Kotonoha was coming to the lab and thinking that everyone already is working there, she found Ibarada Ena asleep on the couch and knew she had spend another night playing video games. She put her lab coat and started working, but upon noticing Shinya and Ayame having some sort of trouble, she checked if she can help them. Seeing their graph, Kotonoha realized that Ayame just started to get used to the kabe-don and that's why her heart rate decreased. But as Shinya and Ayame started thinking it was due to kabe-don being do so often it looked like a sumo move, Kotonoha quickly decided to leave them again.
Kotonoha tried to keep working, but Ayame approached her and asked if she had decided her the theme of her research. Kotonoha considered it to be an optimization problem solving or some puzzle and then recalled how she loved being around her math teacher and likely due to him started to study science. Shinya used the conversation for data and wanted Kotonoha to continue explaining her love interests in attempt to find connection to Ayame's love. But Kotonoha got ashamed and as Ayame interrupted them, she used to situation to get away again.
Later Ayame was chasing Shinya and Kotonoha helped her catch him and tie him up. As their co-worker Ena joined their conversation, she made all of them part of Shinya's experiment and him touching each of their heads and Kotonoha wondered how she ended up in doing that.
As Kotonoha continued her work, she got hungry and looked for Shinya and Ayame and saw them doing their cooking with love experiment. As she observed them, she agreed with Ayame that cooking with love makes the food taste better and she recalled how she cooked for her teacher. When she returned to study, she was feeling even more hungry, but then Shinya with Ayame came and gave her a dish they prepared in order for Kotonoha to have the energy to keep working.