Guns of Crow Steiner.

The Guns of Crow Steiner starts the Frame 27 series. In the floating city of Frame 27, ruled by the religious order The Mortal Frame, fallen angel Crow Steiner leads a ruthless guns-for-hire company. His team includes, Nova, a female ninja forced to pose as a man due to botched paperwork, Poppy Honeycomb, a 4-year-old cyborg prodigy, Viola Primrose, a brainwashed ex-pop star with a shadowy past, and an overly affectionate maid with zero boundaries. Together, they tackle the deadliest contracts...until Crow's past comes knocking, making this ragtag bunch of misfits is the only family he can count on.