Voltron: Legendary Defender (oc reader)

Luna Kinsley is a Garrison cadet along with her friends Lance, Pidge, and Hunk. She was accepted because she wanted to see the other planets and their lifeforms, and study them. She's good at helping others, but her friends need to work as a team.

One night while Lance and Hunk found Pidge and Luna were out picking up alien radio chatter, a vessel crash-lands and inside is one of the missing crew members named Shiro. As they form a rescue plan, an academy washout named Keith arrives and rescues Shiro before the six of them escape into the desert.

Later in the afternoon, the group finds a blue lion in the desert and they fly off to space and into a wormhole to the Castle of Lions in Arus, where they meet an Altean princess named Allura, her royal advisor named Corin, and four space mice. Alurra chosen the six to pilot the lions and form a powerful warrior named Voltron.

Now, the paladins of Voltron will stop an evil overlord named Zarkon and the Galra Empire, and save the universe from total destruction, all while the black paladin is having a certain crush on the white paladin.

(This story is a Shiro x reader)