Talk:Leonardo Watch/@comment-91.152.128.146-20171211010351/@comment-122.220.198.251-20180412021343

The only reason why I think he's around his 20s now is because his baby sister is old enough to get married (he had no reaction at all if her sister's too young for marraige and his family is most likely American with modern values) and because he's old enough to go bar hopping and getting drunk with the gang.

So maybe when he first met the crew, he was 19, but then the arcs after are not chronological and he's probably at his 20s by that point, and majority of the fandom kind of just settled on a mutual agreement on it.