Assassin

The Assassin is the unnamed main antagonist in Royal Space Force - The Wings of Honneamise, who tries chases Shirotsugh Lhadatt and Marty Tohn in Honneamise City. But he steals

street sweeper car and chases Shirotsugh, when he running and killing him with a Honneamise knife

Spoilers
The Assassin appears when he shoots to the Shirotsugh when he holding plate