[Honkai: Star Rail/Arknights] Dan Feng, but He's the Thirteenth of the Sui Family

A cosplayer doesn't necessarily cosplay a character because they like them. Maybe they just have a magnificent face, and someone convinces them, "Stand over there and you'll look exactly like the original, as long as you don't open your mouth." Then, amid all the compliments, they lose themselves and go learn the makeup for a character they've never even heard of. That's how Dan Feng got tricked. Now he was wearing the expensive custom cosplay outfit he'd ordered, with his perfect makeup on, cosplaying a character he knew nothing about except for their appearance, and he'd transmigrated. Just like that, he'd transmigrated as naturally as could be. Did that make any sense? The most outrageous part was that he'd transmigrated to a place he knew very well. Dan Feng looked at the enormous structure before him, feeling the murmurs circling in his mind. The corner of his eye twitched. "...What am I? Say that again. What am I?" [The Heavenly Way leaves one of its forty-nine paths unclaimed. You are the variable.] "That's not what I asked! The thing you said before that! Repeat it!" [...To help you fit into this world, making you a thirteen-year-old in a twelve-year-old movie is perfectly reasonable, right...?] "How is that reasonable?! Do you hear yourself? Cancel it! I don't want to get between other people's moving, heartfelt sibling bonds!" Dan Feng was about to explode. Seriously, being thrown right into an identity this damn intense was more shocking than being tossed into a pile of Seaborne. The voice fell silent, then slowly faded away, pouring its last measure of authority into Dan Feng's body. [The variable... is the essence of life... the source of all things... cherish it...] Don't start waxing poetic at a time like this! A cosplay transmigration where he knows nothing about the character he's cosplaying, and the place he transmigrates into isn't even the right setting. He's been sent straight to Terra. Fortunately, it's the Terra from Arknights, not Holy Terra (?!) But the story starts with our Vidyadhara Dan transmigrating back to his old home, the Xianzhou Luofu from Honkai: Star Rail, with the Arknights plot woven in. Come see a clueless Vidyadhara Dan beat up the Vidyadhara elders and declare, "The Sui Affairs Bureau has my back. How dare you little loaches tell me what to do?" Along with, "One word from me and all of Great Yan will come beat you up," and, "You know Lele the Candleholder? No? He's my brother." Theme: In the face of disaster, we're not without a plan... Wait, wrong story. It's onward to the stars and the deep... Wrong story again. May this journey be blessed!