Board Thread:Naruto Discussions/@comment-1641407-20180923031051/@comment-4912646-20180923050242

For what it's worth, while we know he was an adult, the fourth databook claims Yagura was "young" (at least according to this translation).

Honestly the whole Yagura/Bloody Mist timeline is a huge mess. I was working on gathering all the facts about it into one place a while back, but sort of lost interest. It sucks how there were so many good chances to explore the whole "Obito controlling the village" thing (Naruto meeting Yagura, Obito's flashback, Obito learning that Madara (somehow) secretly also controlled the village), but it was never even mentioned again after Kisame's flashback. The Boruto anime arc didn't even acknowledge that it was a thing, with characters who know better acting like Yagura really was a monster of his own volition.