Abstract
In gacha games, character appearance is considered an important factor influencing sales. This study examined
whether body shape, degree of skin exposure, and specific areas of exposure of 16 limited-edition female characters from
the mobile RPG Wuthering Waves contribute to iOS sales rankings and the volume of derivative fan content. The results
showed no significant effect from overall visual appearance. However, an hourglass body shape was found to be associated
with both metrics. This suggests that distinctive body proportions, rather than overall design, may more effectively stimulate
short-term sales and creative fan activity.