lunar tear
A flower found in NieR and NieR:Automata. It is white and usually portrayed as glowing.
Worth noting, the name 月の涙 (tsuki no namida) lit. Moon's Tear or Lunar Tear, is a reoccurring theme through Japanese popular culture. Especially in songs and a number of video games such as the original NieR, The Legend of Zelda: Majora's Mask, Final Fantasy VIII, and Fate/stay night.