Momoka Hanai (花井 桃香 Hanai Momoka) is Kanoko's best friend from middle school. She is really attached to Kanoko, because she was her first true best friend. She is affectionate towards Kanoko, to the point where she calls her the person she likes the most. Both of them get along well with each other and would do anything to protect one another. She calls Kanoko, "Kano-chan."
Momoka is a very beautiful girl with long brownish blonde hair and light brown eyes. She is almost always seen with a smile on her face. She also has a well-endowed bust and slender legs. She is known to be able to be very popular amongst boys because of her splendid looks. Before, in Warau Kanoko-sama, she was usually seen with pigtails, now she is seen with her hair out and wearing her school's sailor uniform.
Momoka is a very kind, and somewhat of a dim girl. She is a natural airhead, but can see through people's rough personas. She was able to see through Kanoko's cold loner demeanor and knew Kanoko liked being around people just as much as she likes being alone. Momoka was also easily able to see Tsubaki's jealousy and possessiveness towards Kanoko. She gets along well with her little brother, Ume, though he seems to be the mature one. As the series moves forwards, Momoka's observation skills become sharper.
After spending some special moments with Momoka and the other Tomigaoka friends, Kanoko came to really enjoy their relationship and when she was told she would definitely move, she realized that she really liked Momoka and she wanted to keep being close to her, so she convinced her parents to let her live alone during her high school life.
In Koi dano Ai dano, Momoka and Kanoko are best friends and Momoka has become Kanoko's #1, much to Tsubaki's dismay, and Kanoko would do anything Momoka asked. Momoka's observation skills have improved and the time spent with Kanoko has also had an influence on the way she speaks and conveys her thoughts, which is obvious when she calls out Tsubaki's problematic behaviour towards Kanoko.
While at first they only interacted because Kanoko was their mutual friend, they end up becoming friends and Tsubaki openly talks about his love for Kanoko with Momoka and listens to her advice. Momoka won't hesitate to call out Tsubaki's problematic behaviour when it comes to Kanoko and put him on his place.
After going to the hot springs with everyone and having a serious discussion with Momoka, Tsubaki stops thinking Momoka is dimwitted and even admits that if Momoka were a guy, he would have lost already.
Yamada thinks Momoka is really cute and tries his best to help Natsukusa get closer to her. They don't talk much but Yamada is observant enough to know she was ostracized in middle school and to realize Momoka's feelings towards Kanoko.