Proof of Constellation

Proof of Constellation Knowledge (星座の証) is an achievement similar to Knowledge, and awarded to idols who know how to do a Constellation Appeal and did them properly. Currently, Seira Otoshiro, Ichigo Hoshimiya, Ran Shibuki, Sora Kazesawa and Aoi Kiriya are the only idols that are known to have earned Proof of Constellation.