I ISOed Ryu and he doesn't seem like he explained much about his suspicions towards Ekko and Xadlin. But he at least spelled they were suspicious. However there were no detailed explanation to address.
Now I don't knowledge on his meta, so I'm not sure how likely this is to be a scum trait or not of his'. Generally scums are more likely to avoid to make detailed cases on players nonetheless.
Then again I'm mentioning him in particular in that I saw him voting twice when the phases were about to end.