Masurei

"...I don't give a crap about RAS' LAYER! What's wrong with just bein' Wakana Rei?! The Wakana Rei I know may try to act all tough even though she isn't... She ain't perfect... She'll try to endure things when she shouldn't have to, and she can be stubborn as hell... But she's got a lotta good qualities too. I know it and so does everyone else in the band. So stop tryin' to be all cool so that you can become this RAS' LAYER. It's alright to be the Wakana Rei that can't drink black coffee and likes sweet things, you know...?!"

- Masuki in outside/inside Chapter 4 - The Tenacity in My Fingertips

Masurei is the femslash ship between Masuki Satou and Rei Wakana from the BanG Dream! fandom.

Canon
MASKING (real name Masuki Satou) and LAYER (real name Rei Wakana) are members of the girls band RAISE A SUILEN, where MASKING is their drummer and LAYER serves as their vocalist and bassist. They are both second-year high school students who attend different schools; with MASKING attending the all-girls' Catholic school Shirayuki Private Academy, and LAYER goes to Geijutsu Academy, which is a school for fine arts. The two have been passionate about music since they were young, with LAYER attending a music school in her childhood, and MASKING deciding to start drumming in order to chase after her father, who used to be a professional drummer of a death metal band. Prior to being scouted by the band's producer CHU², LAYER and MASKING had worked together as support artists multiple times, and in one of her default menu lines, MASKING mentions LAYER is someone "she can always depend on." Aside from this, they are the only RAISE A SUILEN members who refer to each other, even during performances, with their real names instead of stage names.

outside/inside
The event mostly focuses on LAYER trying to figure out how her fans perceive her stage image, as well as Masurei taking on a gig as support artists. In Chapter 1, the two are called in to the venue and they look over their own scores.

In LAYER's 4★ Card Story Episode, the two are rehearsing in Galaxy. LAYER asks if they could play the chorus together at a faster tempo, and MASKING tells her they need to take a break and how LAYER needs to pace herself even if she's worried about not having enough time before the concert. MASKING asks her what drink she wants, and when she guesses black coffee, LAYER teases her before telling that she'll let MASKING choose. MASKING comes back and takes LAYER's score out of her hands, reminds her she's on a break and gets the latter to yelp after pressing the soda can against her cheek. MASKING smiles at her reaction and LAYER tells her she's won, and the two then start talking about their memories of back when they met while mainly working as backup artists, as well as the first impressions they had of each other. When LAYER mentions how playing together with MASKING felt like a force of nature, she adds that having to keep up with MASKING's ad-libbing and hard solos, and MASKING is taken aback, telling the former how she should have told her if it was too hard for her, and she thought LAYER was having fun. She laughs, telling MASKING that she did actually enjoy herself, and the latter sighs before referring to LAYER as "Wakana-san." LAYER remarks it has been a while since she heard MASKING call that, and the two try wondering just when they started referring to each other with their first names. The two talk a bit more before MASKING tells LAYER she'll stick with her until she's satisfied, and LAYER chuckles as she remembers that she tried to keep people away from her by always looking through her scores, but how it never worked on MASKING.

Quotes
"[...] I tried to be careful, but I had to practice a lot to make it in time... Because of that, I made the rest of the band worry. And Masuki, in particular, really helped me out. But she did get a little mad at me towards the end. I really enjoyed it, though. I felt like I managed to accomplish everything I set out to do... It was like that when I had that fight with CHU² before. We may have butted heads, but we got to have a real heart-to-heart... Ah, please don't tell Masuki about what I said. I just know she's going to tease me about it."

- LAYER to Marina and Player Character in "Number of Bandages..."

Fanon
Masurei is quite popular, especially in the Eastern fandom. It is mostly rivaled by Masurokka, Taerei and on rare occassions even the rarepair Reirokka. At some point the shipwars between Masurei and Masurokka fans have been quite aggressive. However there is also a part of the fandom that ships the three together as the Reimasurokka poly ship. On AO3, it is currently LAYER's most written, and MASKING's 2nd most written ship.

Fandom
FAN FICTION

FAN ART

TWITTER

Trivia

 * MASKING and LAYER are both the tallest and second tallest girls in the franchise (LAYER being 172 cm, and MASKING being tied with Kaoru at 170 cm tall).
 * MASKING and LAYER's seiyuu's, Natsume and Raychell had worked together back in the day before being recruited into the BanG Dream! franchise, with Natsume having worked as a support drummer for Raychell.