Proper noun
(Japanese folklore) The protagonist of 赫映姫の物語 (Kaguya-hime no Monogatari, “The Tale of Princess Kaguya”), a mysterious girl from the moon, discovered as a baby inside the stalk of a glowing bamboo plant.
(chiefly in Japan, informal) Synonym of SELENE (“Japan’s second lunar orbiter spacecraft”)
Source: en.wiktionary.orgAlthough Kaguya Otsutsuki wasn't directly mentioned in the story right until the very climax of the Fourth Great Ninja War, the was always a prevalent aspect of the story. Source: Internet
Isshiki's chakra is comparable to that of Kaguya Otsutsuki, and at full-power, might be even greater than hers. Source: Internet
The progenitor of all chakra, Kaguya was so powerful that she could even teleport her opponents to different dimensions. Source: Internet
That plan was foiled and Kaguya was sealed away after fusing with the creature, leaving the husk behind. Source: Internet
In his full form, Isshiki Otsutsuki looks very much in line with the rest of his clan, thematically, albeit much more demonic/alien in look, with much less feudal-era "flare" than Kaguya or Momoshiki Otsutsuki. Source: Internet
With all this attention on him, Miyuki meets Kaguya after school as promised, and whole crowds are watching, expecting a love confession or a date. Source: Internet