User blog comment:NovaTsukimori/Tsukimori Yuka's Duel Runner/D-Wheel Design/@comment-16107481-20150509050546/@comment-10719116-20150509060827

Well. It appears to be a red cresent with a star inside the semi circle formed by the said cresent. Yuka has a modified version of the cresent that is only present on his headphones which replaces the star with a skull. The Grim Reaper (talk) 06:08, May 9, 2015 (UTC)