1. The tattoo is written in Altean symbols, and Shiro catches sight of it one day when they’re training. They’ve all learned a bit of Altean by that point and Shiro thinks he can sorta read it, but it looks like it says ‘takashi’ but he’s not sure? So he thinks it must be an Altean word with similar pronunciation and he casually asks Allura what the word is and what it means. He’s thinking this is gonna be fun and hilarious, she’ll tell him what the word means and he’ll tell her how much it sounds like his name, it’ll be cute maybe he’ll tease her a lil bit about having his name tattooed on her arm…
But when he asks Allura gets all sad and shy and eventually tells him: “It says Takashi. It’s the name of my soulmate. All Alteans have their soulmate’s true name tattooed on their skin, but of course my soulmate must have died with Altea… Shiro are you alright?” becauSE SHIRO.EXE HAS STOPPED WORKING does he tell her? should he say something? does she even want him as her soulmate?
Bonus: Shiro tries to think of a way to tell her that doesn’t come across as creepy or forward and he can’t think of anything and after about three days of agonising he just blurts out in front of the whole team “My name is Takashi Shirogane!” and everyone’s like ‘dude…… what?’ and now ALLURA.EXE HAS STOPPED WORKING because SHE SECRETLY SORTA HOPED
2. The tattoo is written in kanji, and Allura obviously can’t read it, so she just assumes her soulmate is an alien of some kind. When she meets the Paladins and Shiro, she ~secretly hopes~ he’s the one but nope, they all speak English and Pidge’s laptop is in English (she checked) and she’s never seen any other language from Earth so OH WELL GUESS THAT’S THAT
Then one night she’s sitting up late with Shiro and they get to talking about different Earth languages, and it’s news to Allura that Earth still has SO MANY languages, and Shiro starts talking to her about Japanese. And about learning English and Japanese as a child, and how Japanese sounds and how it’s written. He starts telling her about Japanese writing systems and how it’s written downwards and she’s so cute and fascinated that he just picks up a scrap of paper and goes “here, i’ll show you” and writes his name in kanji. And he shows her and says “that’s my full name, Takashi Shirogane”.
And Allura’s looking at it like… this looks HAUNTINGLY FAMILIAR. So she takes the scrap of paper and asks really shyly: “can i keep this?”. Shiro just thinks it’s adorable of course and says ‘yeah keep it’ and that night Allura goes back to her room and lifts up her sleeve and with shaking fingers holds the scrap of paper up to her tattoo and IT’S THE SAME.