A31

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#31 POSSIBLE FUTURE MEMBERS... AND OTHER TRACKS
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Known tracks for now are ROSA and possibly Tsuina. But Nynthixia is also considering some other people to come. She hesitates a lot for Haruno Sora to come, even if she wonders how she can master her singing.

Seika and Maki are also very considerable tracks due to their S type AI. If Maki is already ready, this is currently not Seika's case.

Hanakuma Chifuyu and Natsuki Karin are also considered as potential options, but Nynthixia is waiting for their demos to see if they are easy enough to differentiate themselves for the other members. It was however confirmed that if one of the two would be invited, the other as well as Kohaku Rikka would come to the castle. All of them possess S type AIs.

Kotonoha twins are however not considered to come as long as their singing would be reunited into a single voice. Morever they don't possess any AI.

If CUL was considered to get a S type AI, she would acquire it as fast as possible. Same for her other sisters.

As for C type AIs, no other track is being considered right now... Unless HIPPI is being announced to get one of them for singing.

Xia Yuyao was a possible choice, but when she was tested for quality she failed it. If she succeeded it, she would have arrived at the same time as Bibi and Wistaria. Kanipan's UTAUloid also had the test in 2015 and failed it as well, even worse than Xia Yuyao's.

Ritsu almost had his Deepvocal version to be used, only to be revealed to the producer the Deepvocal version had lower quality than the Kire UTAU VB. This is why Ritsu never migrated.