Shallura

Shallura is the het ship between Shiro and Allura and from Voltron: Legendary Defender fandom.

Canon
Upon their first meeting, Shiro is quick to follow Allura’s lead and aid her in the revival of Voltron and bringing peace to the universe from Zarkon’s reign of tyranny. Both Shiro and Allura take on leadership roles—Shiro’s being the head of Voltron and Allura’s piloting the Castleship. Since the beginning of the show, they’ve maintained a respectful co-leadership with each other and express concern for each other’s well being.

Season 1
When they first meet in episode 1 of the first season of the series—after the blue lion brought Shiro, Lance, Keith, Hunk, and Pidge to Arus—Shiro is surprised to find Allura and Coran in stasis inside cryopods. After Allura awakens from her long 10,000 year slumber, Shiro is left speechless when she pins Lance to the ground.

Later on in the episode, when the other paladins go out in search of the missing lions and retrieve two others, Sendak appears to confiscate the Lions. This causes the group to argue about the best course of action—either to stay and fight or leave to fight another day. Their argument stops when Shiro intervenes and asks for Allura's opinion on what is the best course of action. After speaking with her father's AI and gathering her resolve, Allura gives a speech, explaining how they are the only hope for the universe. Shiro responds with "we're with you princess".

In episode 10, it is later shown that Shiro and Allura's relationship is that of two equals. When Allura states that she is going with the rest of the team aboard the Galran spacecraft, the others protest. However, Shiro states "fine suit up". Later on in the same episode, Allura and Shiro begin to argue about Allura sneaking aboard a Galran spacecraft to retrieve information; Shiro insists that she should not go alone. When Allura and Shiro are discovered aboard the ship, they barricade themselves in a room. A Galran officer finds them, but Allura rams the door through, knocking the Galran officer out, and takes his blaster. This all stuns Shiro, who is surprised about her amount of strength, leaving him speechless.

Later, when cornered by sentry droids, Allura tries to shoot them with the Galra blaster, but she is holding it the wrong way, and it shoots backwards. After destroying all the sentries, Shiro is annoyed with Allura since she shot the wrong way and asks "I thought you said you traveled around the galaxy. I mean you fly a spaceship, how could you possibly not know how to hold this correctly?" Allura snaps back with "I'm tense. this is a tense situation."

Soon, Shiro and Allura are cornered again by the sentries. Nearby, an escape pod that is about to leave; Allura states that Shiro must leave her behind to escape, but he protests "I'm not leaving without you!" Allura then grabs Shiro by the collar of his uniform and flings him aboard the escape pod just as the sentries get through. Shiro is devastated that Allura sacrificed herself to save him. After being rescued by all the other paladins, Shiro states that they must go after Allura to keep Zarkon from getting his hands on her. The others protest; going after Zarkon's headquarters must be a bad idea. However, Shiro states that that have no choice.

Season 2
Season 2 begins to highlight the relationship as partners and allies. After being separated from the events of season 1 and found in season 2. Shiro's and Allura's relationship is further emphasized by their mutual respect and Trust towards one another. In episode three of the Season Shiro asked Allura why she did not tell the other paladins that Zarkon wasthe original black Paladin Allura responded with "I wanted to protect you from the dark history of the paladins you are the black Lions Paladin now not zarkon." Later on in the episode Shiro savior ulaz who was galra came to try and negotiate with the other paladins. Allura and mediately just trust him due to her bloody history with the galra sure on the other hand begins to vouch for him and trust in what he is telling them is the truth. Allura's trust in Shiro's instincts was enough to go along with his decision to fly into a field of explosive asteroids that turned out to be a hidden base.

Season 3
N/A

Season 4
N/A

Season 5
N/A

Fanon
On AO3, Shallura is the third most written ship in the Voltron: Legendary Defender fandom, the second most written ship for Shiro, and the most written ship for Allura.

Behind the Scenes

 * At the NYCC 2017 panel, Joaquim Dos Santos uses an analogy of a sword to describe Shiro and Allura's role on the team.
 * Question: "Is that familiarity [Allura’s familiarity with the lions] something that she brings to the team now, as well?  Now that she’s out in the field, is that an asset that they can draw on?"
 * Lauren Montgomery: "I think, absolutely!"
 * Joaquim Dos Santos: "Yeah, I mean, when you really think about it, she’s been sort of their beacon, their guiding light in this.  If Shiro has sort of been like the edge of the sword, she’s been at the very, very tip of the sword saying like, 'That’s where we gotta go.'  So, yeah, she’s the most familiar with all of this.  With the whole universe."

Fandom
AO3

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Trivia

 * Both Shiro and Allura were given parental nicknames by the fandom. Allura's being "Space Mom" and Shiro's being "Space Dad"
 * Josh Keaton has fully embraced his Space Dad nickname. Even owning a shirt with the words on them.
 * Josh Keaton tends to playfully bow to Kimberly Brooks whenever they're around each other.
 * There have been many parallels between Shiro and Allura with the paladins of old that suggest they may fall in love at the end of the series—from Zarkon meeting Honerva, to Allura's father Alfor and her mother when Shiro wears armor similar to Alfor's and Allura was wearing colors that match her mother's clothing.