Sakai writes, pencils, inks and letters Usagi Yojimbo, and his personality shows through in every panel. In contrast to grim samurai stories like Lone Wolf and Cub, Sakai's tales are full of gentle humour, and his heroes are good-natured and generous. Sakai also works as a letterer on Groo, and there are obvious similarities in style and presentation. Like Groo, there is sometimes violence, but it is always rendered in a cartoon style that makes it palatable and inoffensive. Characters fight and die, but they never bleed.