__Height__: 181cm
__Race__: Part-Human, Part-Gear  
__Relatives__: [Ky Kiske](https://anilist.co/character/30932/Ky-Kiske) (Father), [Dizzy](https://anilist.co/character/36060/Dizzy) (Mother), [Sol Badguy](https://anilist.co/character/30931/Sol-Badguy) (Grandfather), [Justice](https://anilist.co/character/267726/Aria-Hale) (Grandmother).
__Professional Status Occupation__: Bounty Hunter
__Weapon__: Flag   

Sin is the son of Ky Kiske and Dizzy, inheriting his mother's Gear blood and great power. Sin has a happy-go-lucky and optimistic disposition, and while he isn't the most well-spoken and can be cocky at times, he has a big heart and tries to improve his shortcomings one at a time. 

Because of the Gear blood he inherited from Dizzy, Sin developed extremely quickly after his birth. Despite his looks, he’s actually not even ten years old yet, and is still rather immature mentally. However, with Ky busy ruling a nation and wanting to keep Sin away from the public eye, he was entrusted to Sol Badguy. Under Sol's guidance, Sin accompanied him across the world in search of bounties, carrying most of their equipment along the way and assisting him when needed. Due to Ky's decision, Sin grew to have a distain for his father, but learned to forgive him and mended his relationship with Ky over the events of Guilty Gear 2 and Xrd. During Xrd, he becomes friends with [Elphelt Valentine](https://anilist.co/character/355510/Elphelt-Valentine) and her sister [Ramlethal](https://anilist.co/character/227815/Ramlethal-Valentine), being one of the people who helped Ramlethal tap into her human emotions.

After the events of Guilty Gear 2, Xrd and Strive, he is currently living peacefully with Ky and Dizzy while continuing to help those around him.


Sin Kiske, the forbidden child of a human and a magically crafted biological weapon called a Gear, lives in a world where magic has replaced science, and scars from the Gear rebellion remain. Attending his parents’ taboo-breaking wedding, he encounters a mysterious girl with deep hatred for Gears, and their fateful meeting threatens to upend the world once again.<br><br>
(Source: Crunchyroll)

Set in the year between the events of the first two games, the story revolves around two new characters exclusive to the manga: Tyr and Mizuha, and the mystery of severed Gear parts falling from the sky.  Members of the Post War Administration Bureau (P.W.A.B. for short) - the secretive organization responsible for many events in the games - serve as the antagonists of the story.  Characters from the games, such as Sol, Ky, Axl, Potemkin and Kliff, also appear, albeit with relatively minor roles.