Board Thread:Questions and Answers/@comment-33790467-20190220205255/@comment-995426-20190221043848

That's complicated, considering they're reincarnated and were born centuries ago, even before the Renaissance artists their reincarnations were named after. In mental age they were teenagers when they were killed in their human lives, though not all the same age. But since reincarnation, they can (theoretically) keep maturing now.