The Princess and Grand Seeress of the Emberyan empire, and a bubble world version of [[Theresa Apocalypse]]. She first appears near the end of the "Odd Drifter" event as the one who masterminds the whole event in order to fix the anomaly that the Captain accidentally caused, and later appears in "Honkai Kingdoms: Zero" event, receiving Captain's help to slay a certain Beast that threatens her country. She becomes the main focus in "The Day You Vanished with the Stars".

Initially available as a stigmata set, she becomes playable as Theresa's Starlit Astrologos battlesuit.
观星 朔夜观星 朔夜觀星 諸葛孔明・星詠の朔夜 삭야관성