The White Room (白の部屋 Shiro no Heya) is an extra-dimensional space strongly connected to the Selector battles. After her death, Mayu came to inhabit the room as a spirit, and it is from there she monitored the Selector battles. Here, Mayu received Selectors who have become Eternal Girls and are soon to become LRIGs.
In a bid to end the Selector system, Rūko Kominato confronted Mayu in the White Room with Yuki, who battled against Mayu and Urith. After Mayu's defeat, the White Room seemingly disappeared. However, the emotions of the Selectors that had suffered under the previous system coalesced into Mugen. Due to Tama and Yuki's continued existences, the White Room continued to exist.
Throughout the second Selector system, the White Room was used to recruit new Selectors, who would meet the LRIG of the Beginning. Whenever a Selector's memories and personality disappear in accordance with the system's rules, their memories would be stored as coins inside the White Room.
After the end of the second round of Selector battles, Mugen began the third round of Selector battles, seeking a new master for the White Room to continue the Selector battles. The third system was designed to have a singular winner, who would then enter the White Room and assume their duties as its new master. Kiyoi Mizushima become the winner of the third round, but she chose to confront Mugen. After Kiyoi defeated Mugen, the White Room ceased to exist.
| Lostorage incited WIXOSS | |
|---|---|
| Characters | Suzuko Homura ● Ril ● Chinatsu Morikawa ● Mel ● Hanna Mikage ● Nanashi ● Shou Narumi ● Aya Shohei Shirai ● Dona ● Sou Sumida ● Guzuko ● Rio Koshiba ● Mama ● Kagari Yukino ● Yukime Kou Satomi ● Carnival ● LRIG of the Beginning ● Kiyoi Mizushima ● Piruluk ● Aya Narumi |
| Terminology | Selector ● LRIG ● Selector Battle ● Coin ● White Room |
| Music | Lostorage ● undeletable ● Lostorage incited WIXOSS Original Soundtrack |
| Lostorage conflated WIXOSS | ||
|---|---|---|
| Characters | Kiyoi Mizushima ● Allos Piruluk ● Ruko Kominato ● Tama ● Suzuko Homura ● Ril ● Yuzuki Kurebayashi ● Hanayo ● Hitoe Uemura ● Midori ● Chinatsu Morikawa ● Mel ● Hanna Mikage ● Nanashi ● Akira Aoi ● Milulun ● Dona ● Kaede ● Layla ● Aya ● Guzuko ● Carnival ● Remember ● LRIG of the Beginning ● Eternal ● | |
| Minor Characters | Shohei Shirai ● Shou Narumi ● Sou Sumida ● Kou Satomi ● Amika Hashimoto ● Ayumi Sakaguchi ● Mayu ● Yuki ● Kazuki Kurebayashi | |
| Terminology | Selector ● LRIG ● Coin ● Key ● White Room | |
| Music | Unlock ● "I" ● Lostorage conflated WIXOSS Original Soundtrack | |