"A name whose feat would become legend". Hmm try as I may I can't seem to find a character that would fit Shin's position, is he a real character even?
@Carmichael Li Xin (李信) was a general of Qin during the Warring States era. Li Xin is primarily known for his role in assisting Qin Shi Huang in his conquest of the six Warring States. Aside from his career in the Warring States campaigns, he is also a fifth generation ancestor of the Han dynasty "Flying General" Li Guang. -wiki
So that's how they deal with Shin being from the same clan as Riboku.
@Carmichael Shin (Li Xin) actually existed, though by all accounts he wasn't that famous or legendary. Hata probably chose him precisely because we didn't know much about him. Hell, Ouhon and Mouten were probably more historically relevant than Shin.
Been ages: IIRC Historically Kyoukai ended up fighting against him, But that doesn't mean that it will happen here, afterall the mangaka hasn't exactly followed into the footsteps of history, just look at the 'Death of General of the wall/Heki' shenanigan.
Well, I guess this bypasses the potential family drama that Ri Shin (Li Xin) comes from the same clan that Ri Boku (Li Mu) comes from, however distantly related they are.
They really hit us with those panels of the lady wondering where Shousa is. And then Kyogai lightens the mood by trying to possess Bihei.
I actually got jebaited by the house joke. Of course Shin wouldn't give a shit if he lived in a shack. It was pretty adorable how he was too distracted by the child chanting "general" to listen to Garo's drunken rant.
He actually tried to pick the same last name as Sei, the madman. It's kind of ironic how he ultimately went with the same last name as his mortal enemy. I wonder if he got the connection but went with it anyway because Hyou's legacy is more important.