In the world of One Piece, Kuma and Saturn share a complex and intense relationship. They've been seen engaging each other in battle, with Kuma even injuring Saturn at one point. Saturn, not one to back down, has also threatened Kuma and attempted to impale him multiple times. Their confrontations are not just physical but also strategic, as Saturn once took control of the Pacifista, a weapon associated with Kuma. Despite these conflicts, their relationship also has a past, as they were shown engaging each other on God Valley when Kuma was younger. It's clear their relationship is marked by power struggles and intense battles.