EmmaKasu

EmmaKasu is the femslash ship between Emma Verde and Kasumi Nakasu from the Love Live! fandom.

Love Live! School Idol Festival ALL STARS
Emma and Kasumi are the members of the "Nijigasaki High School Idol Club", however because of misunderstandings of the members with the former club's leader Setsuna Yuki, the club was fractured by their leader itself during the group's break, with Emma (who flew back to Switzerland), Shizuku and Kanata were all split up from the club, leaving Kasumi the only remaining member. By the time the player formally joins the club with Kasumi's help to restore the club back, Emma has just arrived from her home country and Kasumi was really worried for her. Over the course of the story, the two eventually get along from time to time.

Love Live! Nijigasaki High School Idol Club
Sometime before the show takes place, Emma and Kasumi, along with Kanata and Shizuku, were used to be the original members of the "Nijigasaki High School Idol Club" founded by Setsuna Yuki, however due to its members were unable to keep up with Setsuna, especially for Kasumi whom was hit hard by her passion into idol, the club was outright disbanded during the group's supposedly break just ahead of their debut concert at DiverCity. In spite of being former members of the group, the two rarely interact each other apart from officially restoring the school idol club and and where the School Idol Festival should be held.

In preparation for the 2nd School Idol Festival, Nijigasaki is inviting several schools for the joint concert. with Jennifer and Rakshata from Y.G. International School being the first to volunteer because Emma knew about them. Their conversation went normally, however when they talked about Lanzhu's concert from the other day and why she isn't part of the club yet, Kasumi snapped out of jealousy at Lanzhu's performance. While everyone's making conversastions, Emma began worrying for Lanzhu because she knew they were both transferred student to become a school idol, so she want to ask her to which surprises Kasumi and went out to assist her. The plan didn't go well when Lanzhu immediately declined and walked way from them. The pairs end up walking together around the campus (one which takes place just outside the main building) and meet up at the entrance of the campus after their class session, shortly before they spot Kanata and Rina walking out towards the entrance and discussed about Lanzhu's fanpage that she'll host her own concert somewhere. As soon as they saw Lanzu passed by, they stealthly followed her all the way to her concert. Concerning about Lanzhu being alone all by herself, Emma formally founded the group with Kasumi, Kasumi, and Rina to show a prove to Lanzhu that school idols needed some form of connection with the fans to improve as a whole group.

After the success of Nijigasaki's "First Live with YOU" major concert, Kasumi was requesting an antique chair for their club room, but Shioriko, who was now the new student council president, declined her request. Emma however comforts Kasumi by gently rubbing her head and told her she was pretty sure if Setsuna was still the student council president, she would declined her request too. Kasumi was left no choice but to agree with her.

Moments

 * Muteki-Kyuu*Believer MV: Kasumi is asking Emma about the bread she's eating, later there's a still shot of Emma holding a basket full of bread with Kasumi's plush doll on it, and another with Kasumi taking nap on Emma's lap while she gently rubbing Kasumi's head.
 * Mirai Harmony MV: As featured from the main image, a still shot of Emma and Kasumi holding hands together while lying on the ground just before the screen flashes.
 * S1EP4: The moment Kasumi puts the last piece of the club's room to reestablish the school idol club, Emma says the club is finally back and Kasumi immediately calls for the club meeting.
 * S1EP5: After Emma successfully convinced Karin to become a school idol, in a club room, Kasumi asked Emma if Karin wants to become an idol too and she replied her with the more the merrier.
 * S1EP6: During the group's communication with Rina at her apartment, Emma can hear Rina's voice and Kasumi respond if she really hears it.
 * S1EP11: Emma and Kasumi made a lengthy chatter about where the School Idol Festival venue should be held.
 * S2EP2: A still shot of Emma and Kasumi walking together outside of the main campus building.
 * S2EP3: At Kasumi's home, Kasumi imagining of them wearing fatasy outfits. Shortly after that scene, Emma discovered Kasumi's photo album at which she hastily doesn't want to reveal her childhood photos. At the dinner, they glanced at each other.
 * S2EP7: At one point, they both smiled at Kanata when she jokingly asked Shioriko that she worked so hard as the student council or the school idol festival won't be a success without her involvement.
 * S2EP13: Emma comforts Kasumi by rubbing her head when her requested chair was declined by the student council president Shioriko.

Fanon
EmmaKasu is one of the least popular Nijigasaki ships in the canon and within the Love Live fandom. While they're technically part of QU4RTZ subunit, Emma and Kasumi however rarely interact in the series aside from their few moments in the story and in selected songs; even if it does, the ship's popularity remains largely unchanged. Despite the status of this ship, certain fans has found potential of this ship primarily because of unique traits and charms surrounding them when they paired together, primarily their cute voices and their relatively height difference (and to extend, their oddly matching hair colors). It is said that Emma and Kasumi have a matching vocals when they interact together especially in selected group songs where the two have a short duet.

EmmaKasu forms a mutual friendship with KanaRina and other least popular Nijigasaki pairs, however it is heavily rivaled by popular ships such as ShizuKasu and EmmaKarin, and it's being contested with mutual ships KanaKasu and EmmaRina.

Fandom
FAN FICTION

TWITTER

PIXIV

Trivia

 * Both are part of the subunit QU4RTZ.
 * Both shares the same pure attribute of Nijigasaki High School Idol Club.
 * Both shares the astrological sign "Aquarius".
 * In both Love Live! School Idol Festival and Love Live! School Idol Festival ALL STARS mobile games, Emma and Kasumi can be formed as a single team with only consisting of their cards; and in ALL STARS, the pair can be viewed in the gameplay/MV of certain songs where the two can be interacted, and forming the SP gauge with 2 Emma cards and 1 Kasumi card or vice versa will have SP animation of the ship, provided that the 3D settings is enabled in the settings.

Variations

 * QU4RTZ refers to the ship between Emma Verde, Kanata Konoe, Kasumi Nakasu, and Rina Tennoji.