Either Alfor or the Queen are like "Fuck the Space Police" and add Coran to the royal line registry. Coran only finds out in the present.
I like you. Ok, so, polyverse, natch.
“Oh my, oh my, oh my, it has been so long since we have had such distinguished guests!” the tiny Turimonqua maid was chirping, her rainbow lace wings flashing in the light as she fluttered from person to person to pin their access badges to the collars of their clothing. “To think, an entire royal entourage!”
“Your mistress’ hospitality has been very impressive,” Allura said politely as she bowed, prompting the rest of them to follow suit. “Thank you for putting us up on such short notice.”
“Oh, it is no problem at all. Anything, anything at all for a king and his daughter!”
“I- I beg your pardon, run that by me again?” Coran asked hesitantly.”
The maid produced a tiny scroll made of glimmering light. “You are Coran, first of his name, Second Father to Allura, Fourth of the Allura Title, correct?”
“I- well, yes, but I was unaware that-”
“Then it is settled! Come, come, your rooms are this way!”
“A king?!” Lance asked, gaping, as Coran paced back and forth in the common area that joined their rooms.
“Believe me, this is just as much a surprise to me as it is to you,” he protested. “I mean… they’d always said they would, but-”
“Said they would what?” Shiro prodded.
“Well, it was always a given that if anything were to happen to their majesties before Allura came of age, I would care for her,” Coran said, and Allura took hold of his hand and squeezed. “But it was always going to have to be behind the scenes as her retainer. The nobility never would have accepted me stepping up to the throne.”
“Why not?” Pidge asked. “You were practically their second in command. Who better?”
Coran scratched the back of his neck, looking distinctly uncomfortable. “Mm…”
Allura squeezed tighter. “I’m right behind you, Aipa.”
He sighed. “The fact of the matter is, Altea had a very deep split along class lines. Alfor and Illyere worked very hard to do better by the lower classes, but the nobility fought it tooth and nail. It was the scandal of scandals when it came out that the three of us had formed a relationship. Whispers ran from them slumming it to me attempting a coup from the bedroom.”
Hunk made a very unamused growl, pounding fist to palm. “Too bad we couldn’t have been around then to knock a few heads straight.”
“Hell yes,” Lance agreed, grin vicious, and there were some grim agreeing nods.
That finally seemed to take the worst of the tension out of the room when Coran laughed. “Thank you. And to be honest, your predecessors were much the same way about it. But… there you have it.” He raked his fingers through his hair. “I can’t believe they actually did it, though.”
“Well, you know how Mama loved to thumb her nose at her fellow bluebloods. There’s probably video recording somewhere of her and Papa and Archivist Michika laughing as they filed it to record.”
“Hey, I bet we could find it,” Pidge said with a wicked grin. “What do you think the search code would be?”
“Ten to one it was a present…. Aipa’s birthday.”
Coran groaned. “They would.”
“Birthday hunt for King Coran!”
“Don’t you dare start calling me that, I swear on-”