h0saki: Initial designs of Satsuki by Sushio and Shigeto Koyama from The Art of KlK Vol 1. In the second pic (by Koyama) Satsuki looks a lot like Ryuko, pretty cool actually. And damn trench coat Satsuki is still best Satsuki.
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original: https://motorcyclles.tumblr.com/post/107640556122