User blog comment:Conza17/Nine Gates and Nine Circles/@comment-5268982-20131119165316

For me, Silver is also a possible candidate for the 3rd circle simply by the description (icy downpour of rain) and for similar reasons, Tempesta could be lust(trashed back and forth by the wind of a violent storm) because I don't think Sayla can use wind Magic.

On the other hand, despite your analysis being really nice and all, the 9 Demon Gates may symbolize the reason that the humans became Demons. For example, Silver may have been created because of Lust, whereas Minerva will probably be created because of Wrath(against Fairy Tail). According to the strong feelings that make a human decide to become a Demon, he gains a demonic power similar to the reasons that made him/her this way. At least that's what I thought under this concept.