: This article is a . You can help My English Wiki by expanding it, or perhaps you could contribute to discussion on the topic. Mobile Suit Gundam Crossbone: Skull Heart (機動戦士クロスボーン・ガンダム スカルハート, Kidō Senshi Crossbone Gundam: Skull Heart) is a single-volume manga written and illustrated by Yuichi Hasegawa, and published in Gundam Ace between 2003 and 2004. It is succeeded by Mobile Suit Crossbone Gundam: Steel 7.