Knowing that Setsuna is artificially created only creates another mystery: what was his intended purpose? Was he designed simply to be a soldier, or was he created specifically because his universe needed someone capable of becoming Gavan?

The answer could also explain Setsuna’s personality and his initial hostility toward Reiji. If he was programmed or conditioned to believe that there could only be one legitimate Gavan, his reaction may have been based on more than simple confusion.