Sidus Gataki, an infamous and powerful bounty hunter nicknamed as "Green Ribbon", often ruthless and merciless to his enemies.
He is also called "Ace of Hunters" for being on pair with the elite hunters' skills, meaning that he is skilled and powerful.

[This is a business account used for promoting Green Ribbon by @Hedgingfort  and is dedicated to the main character of the novel, Sidus Gataki]