[Crossover] The Big Shot with a Face Like Ran's Blade

[Updating The Man I Wronged, This Time I'm Writing a Powerful Figure in Plain Sight] Everyone in the Honmaru knew that Ichigo Hitofuri had taken in a pitiful little Yagen Toushirou who had fallen into corruption. "He" had lost his memories and his mind (?), but was doing his best to recover and bring warmth to everyone. Ichigo Hitofuri adored him: "Oh, my little brother..." Later, everyone saw the pitiful little Yagen take on over a hundred Time Retrograde Army soldiers alone. Wherever his icy blade fell, blood froze and limbs were severed. The swords: "...Dad!" Later still, after every sword spirit and dogeza-loving Saniwa had been poisoned once, they cried, "Put that apple down! Don't peel it with your own body!" This is probably a slice-of-life story about a Chinese sword spirit trying hard to live up to his "character setting." Guess the pairing yourselves. P.S. Zuizui is a newbie who just joined the Touken Ranbu fandom and knows zero Japanese. Blame me for any OOC moments. The Japanese setting follows the Chinese version. If that bothers you, please let me know and gently correct me in the comments. Zuizui will make changes!