Juufuutei Raden and Sorashina Sopia Name Their Duo “Rapi Cube” at an In-Person Collab

HOLOLIVE — Juufuutei Raden of Hololive’s DEV_IS ReGLOSS and Sorashina Sopia announced a name for their duo, “Rapi Cube” (ラピキューブ), during an in-person collab stream on Thursday. They said the name has a longer formal version, which they will use for projects, and the short form, which they will use for the tag when the two do something together. They asked viewers to use the tag #ラピキューブ in the meantime.

The two settled the spelling on stream. After a debate over whether the long-vowel mark should be straight or wavy, they put it to a viewer poll. The wavy mark won, 67 percent to 33 percent, and Raden posted the tag from her account in full-width characters to check that it worked as a hashtag. The stream, titled “Raden-Sopia Collab,” ran about an hour and 50 minutes.

“Please remember Rapi Cube and take it home with you.” — Juufuutei Raden and Sorashina Sopia, after announcing their unit name

Before that, the pair, childhood friends who are now both at Hololive, spent the opening on setup and sake. They shared one microphone at first, and Raden’s voice drowned out Sopia’s until they brought in a second microphone for Raden. Raden poured Kirinzan, a dry sake she likes, and Sopia brought dried mentaiko, spicy cod roe, that was two days past its best-by date. It turned out hard enough that they debated whether it could be eaten, and Sopia tore a piece off by hand and called it delicious. They also talked about Raden’s three years in Hololive and Sopia’s first two months, and Raden’s advice not to overextend.

The talk then turned to how art and science overlap. They said both fields rest on technique and on how people express the world, and moved from Surrealism to a twin-lens reflex camera, which one of them showed on screen. They described film developing as a sequence of timed baths, and later poured the same sake into a ceramic cup, a porcelain cup, a glass and a wide shallow cup. Porcelain and glass seemed to hit more directly, and the wide cup smelled stronger, which they guessed was down to its larger surface area, though they said they could not tell whether it was perception or physics.

For what comes next, they listed a visit to a camera museum, a challenge in which each buys items at a 100-yen shop that are far from the other’s field and then ties them to it, a two-player adventure game, a song cover they said they would keep secret, and matching outfits. Raden said ReGLOSS holds an online AR live on Nov. 29, and Sopia said she has a game collab with senior members at 10 p.m. the next day.