The official website for upcoming Island
TV Anime has announced additional cast members. The cast members announced are the characters that will appear exclusively in the anime. The anime is slated for 2018.
Mei Tandori: Yui Nakajima
An Hatoma: Tomoyo Takayanagi
(Hina Logi: From Luck & Logic
Emiri Sunada: Takako Tanaka
The anime will have AnimeJapan 2018 stage on March 26, and will reveal a PV as well as announcing the cast member of the main character Setsuna Sanzankai. Kana Asumi
(Karen Kurutsu) and the three cast members that recently announced will appear.
Source: Comic Natalie