Yukino Amagai is a Japanese manga artist and illustrator known for adapting light novel series into manga formats. Amagai is female, with a recorded birth date of October 9 and O blood type, though the specific year of birth is not publicly documented.

Amagai is best known as the illustrator of the manga adaptation for the series The Insipid Prince's Furtive Grab for The Throne. The original work is a Japanese light novel series written by Tanba and illustrated by Yuunagi, which began serialization online in February 2019 before being acquired by Kadokawa Shoten. Amagai's manga adaptation began serialization online via Kadokawa Shoten's Young Ace Up website on December 25, 2019. Both the light novel and the manga have been licensed in North America by Kadokawa, with the manga released digitally in English on the BookWalker platform. The series follows Arnold, the seventh imperial prince known as the insipid prince, who secretly operates as an SS-rank adventurer named Silver while supporting his twin brother's claim to the throne. An anime adaptation of the series has been announced.

Prior to this work, Amagai was involved in several other manga and illustration projects. Amagai worked on the manga adaptation of the visual novel Memories Off 6 Next Relation in 2010. Amagai was also the author and illustrator for the series Shishunki na Adam EVIL EYES, published by Kill Time Communication. The original Shishunki na Adam light novel series, written by Kasa Sakaki with illustrations by Amagai, was published from 2009 to 2018. Amagai additionally worked on the manga adaptation of the visual novel Shin Koihime Musou Otoha Tairan, which was published between 2011 and 2012. In these works, Amagai primarily serves as an artist adapting existing stories rather than originating the narrative concepts, though Shishunki na Adam EVIL EYES represents a case where Amagai is credited as the author.