These are novel illustrations that were included in volume 10.
Front and Back Cover
Front Cover
Takumu and Haruyuki
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Kuroyukihime and Wakamiya Megumi
Lagoon Dolphin and Coral Merrow
Kirito
Color Circle and Metal Color Chart
Page 009
Character Description
Page 055
Page 075
Page 100
Page 126
Page 155
Page 231
Page 305
Page 315