Rico

has 350/945 (Min/Max) units of health and wields an acid shotgun dealing 80/216 (Min/Max) units of damage. Acid weapons cause 100% of their damage against flesh targets and 130% of their damage against shielded targets.

His shotgun attack only delivers 30% of the rated damage to enemies at the longest distance. This makes Rico's attack normally less effective than Frisky. But Rico's higher Health, ability to damage armored enemies, and massive damage on close quarters makes him useful in some battles.

can be found at the Swamps, where you can recruit him for 3500.

Training
A partner's rank can be upgraded at the Training Range, increasing the partner's health and attack damage.