Q10:
Do Elans age? As in, will an Elan that reaches 400 look the same as he did when he was 30 or will his body physically change, even if just a little, when he gets older? If you have an Elan who was made when he was a child, like say, 12, will he always look like a 12-year-old?
well, the only answer I have isn't quite so simple (i.e., I don't think that RAW goes in to too much detail about it).
So, here's my comprehensive answer:
[spoiler]
in RL, physical aging has basically 2 stages:
1) developmental maturation
2) degeneration
Once you have fully developed, it's all downhill from there. The negative effects of aging is primarily do to damage that occurs to the DNA/RNA -- which can be accelerated by various environmental conditions (air/water quality, lifestyle habits, etc.)
A good analogy would be a xerox machine. Print a text document, and then make a xerox copy of it ; and then make a copy of the copy ; and then make a copy of
that copy ; etc. -- with each successive copy, the quality of the document will degenerate, until eventually, you will end-up with nothing but a page of black blobs and smudges that has not one single readable letter.
With creatures that don't experience the negative effects of aging, or that do not die of old age -- this would translate to their DNA simply being so perfect as to be completely incorruptible.[/spoiler]
So, to answer your question -- I'd say that they would age up until the point of adulthood, and then stay perfect from that point on.