Like others have said, we’re gonna get more on Ryuma when Zoro visits his grave at the end of the arc.
I’m more curious about why Hitetsu thought Hiyori would know about Wado Ichimonji. The only person who probably could’ve told her about it is Denjiro. Is he a Shimotsuki too? If he and Zoro are Shimotsuki, it’ll be the largest family we know about from the Straw Hats. Basically every family except BM’s obviously.
I’m more curious about why Hitetsu thought Hiyori would know about Wado Ichimonji. The only person who probably could’ve told her about it is Denjiro. Is he a Shimotsuki too? If he and Zoro are Shimotsuki, it’ll be the largest family we know about from the Straw Hats. Basically every family except BM’s obviously.