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It's Yuyuko!
38x70 blocks.
I'm really happy with how this one turned out, although I couldn't get the butterfly pattern on the dress right. So I made my own and put it there.
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I'll just leave this here... (yes, that's defunct spawn tower in the background)
Not bad at all. How long does it take you to do these?
Looking for a good source image takes around 10 minutes max, finding a decent place to build 5 minutes max, terraforming takes 30-240 minutes depending on the size, duplicating resources takes around 5 minutes, and the actual build ranges from 1-4 hours. Youmu took about 9 hours total, this Yuyuko is the result of about 7. Suwako took 6 or 7, and Cirno took 2.