[3] Other character aspects were based on their voice actresses, such as Tae holding street performances in the second season of the anime being inspired by Sae Ōtsuka doing the same as a teenager and Chiyu and Risa Tsumugi both being fluent in English.
[2] The Third, a backup band that provided instrumentals for live concerts by Afterglow, Pastel Palettes, and Hello, Happy World!, debuted as its own group alongside Poppin'Party and Roselia in April 2018.
is a retelling of their formation from the first season;[17] "Colorful, Poppin' Candy" follows the band's plans to save the downtown festival;[18] "Double Rainbow" focuses on an argument between Arisa and the others;[19] and "Live Beyond!!"
A skilled guitarist who has been playing since she was little, she loves music and works part-time at a live house, the money from which she saved to buy her blue ESP Snapper guitar.
[46] She has a tendency to compare herself to her older sister, which leads to writer's block when she is tasked with writing a theme song for the downtown shopping district,[47] though she gradually learns to develop her own image with her band's help.
[48] During the Girls Band Challenge, Rimi and Arisa partner to create a promotional music video for Poppin'Party,[49] though the fun she has during the competition causes her to worry about its conclusion ahead of the final before being comforted by the support of the fans and her bandmates.
[14] Although her friends' antics exasperate her, such as scheduling practices in her basement without her permission, she is dedicated to Poppin'Party, including leading the band in creating a music video and increasing their performances to gain traction in the BanG Dream!
[71] Despite the band's early success, Yukina secretly holds meetings with agents to expedite her entry into Future World Fes on her own, resulting in a falling-out when Ako and Rinko find out.
[75] The band later plays at the Sweet Music Shower event, but a poor performance prompts Yukina to revert to her colder nature in an effort to restore their sound, leading to Ako running away.
[84] When the Girls Band Challenge begins, Sayo is reluctant to take part in it and Roselia's battle with Raise A Suilen due to Future World Fes, but after visiting Chiyu's penthouse and hearing her explanations, she is motivated to defeat RAS.
[90] Ahead of Future World Fes, she questions her reasons for being part of Roselia,[91] but conversations with her bandmates and reminiscing about her youth with Yukina prompts her to recall wishing to support her childhood friend in music.
[101] As a skilled seamstress, she designs Roselia's costumes, each with varying themes; for example, the band's "Neo-Aspect" outfits feature a clock-inspired motif to symbolize the stoppage of time (after an argument causes them to separate) and the clock hands' movement as one (upon reconciling).
[124] When the band becomes fractured by Ran repeatedly distancing herself prior to Girl Jam, Moca directly starts an argument in Tsugumi's hospital room that boils over until they are chided by a nurse, causing them to realize their friendship is too strong to be broken by petty disagreements.
[118] A close friend of Lisa, Himari admires her fellow bassist and upperclassman's reliability and aspires to emulate her,[130] though her bandmates insist she is capable enough on her own thanks to her actions and support for them.
After Pastel Palettes' disastrous debut performance, a skeptical Chisato attempts to leave the band as she feels she could not remain with a failing project that would ruin her reputation,[150] but the ongoing negative publicity and potential fallout should she quit force her to stay.
[154] Although she enjoys her time with Pastel Palettes, Maya initially struggles with her presence in the band as she feels she does not fit the proper image of an idol due to her interests and awkward nature.
[164] Due to her wealthy background and optimistic outlook and personality, she frequently leads the band in absurd activities like restoring a dilapidated amusement park and going on an island adventure.
's description provided by Bushiroad; despite initial concerns about portraying Kokoro due to the demands of the character's hyperactive personality, Itō figured "not to think too deeply" when voicing her.
[173] In the drama club, Kaoru often collaborates with members of other bands for concerts, including Roselia's Yukina and Rinko, Pastel Palettes' Chisato and Maya, and Afterglow's Tomoe and Himari.
Misaki is tomboyish, reserved, sarcastic, tends to react poorly to her band's crazy and wild antics, and has a hard time staying positive no matter the situation.
[187] When Tae is unavailable during the cultural festival, Rokka attempts to stall by playing a guitar solo, which later catches Chiyu's interest when video of the performance is posted online.
[190] and is a fan of Pastel Palettes, regularly covering songs by the band and uploading them online;[193] and at one point waiting in front of the stage all day during the World Idol Festival to see them perform.
After befriending Tsukushi and Tōko, Mashiro attends a mini-live at CiRCLE that inspires her to create her own band, including putting up recruitment posters and writing about her ambitions into a guestbook at the live house.
[203] Encounters with Tōko, who praises her lyrics' impact on the others and asks her to ponder if she truly wants to play music, and Kasumi, who elucidates on how much Poppin'Party means to her, convince her to rejoin the band.
She has a quite mysterious background, and has been referred to by Taki as a "stray cat" due to her whimsical nature, appearing at RiNG to perform open mics or to practice with the band albeit infrequently.
Deep down, however, Soyo is also deeply impacted by the breakup of CRYCHIC and can be emotional to a point she is eager to do everything to revive the band, such as attempting to convince Sakiko to rejoin and planning to discard Anon and Rāna once necessary.
She is the youngest in a family of five sisters, and according from Soyo, one of her older sisters—who attends Tsukinomori—used to be the president of the brass band and a member of the local orchestra which frequently participated in and won competitions.
She is a first year student at the Hanasakigawa Girls' High School, classmate of Taki and Umiri and Sakiko's childhood friend, with a bright personality, and loves stargazing.
On the other hand, she agrees to join Ave Mujica after being convinced by Sakiko, seeing it as the only thing keeping her childhood friend motivated, and is thought to be responsible for bringing Umiri Yahata to the band.
Her father went into bankruptcy after he took responsibility for a fraud case with a loss of ¥16.8 billion (US$153.08 million) at his family company, leading to him being disowned and becoming an alcoholic, prompting Sakiko to take care of him instead of staying with her grandfather.