Hirmou Arakawa contributed the character designs. Some of the characters resembled FMA characters a bit too much like Keiro and King Bradley and the quintuplet bandits looked like Major Armstrong. After that feeling passed and I got invested in the series, it really came into its own. It was kind of standardized shonen but it did have some interesting characters; it was interesting learning of their pasts. The show was kind of unbalanced at first, being funny then going straight into serious situations, so I'm glad the tone changed midway through the series.