Ino

Ino is a tiny piglet coated in light brown fur, with dark stripes running down its back and a paler belly beneath. A small marking sits just under its eyes.

The piglet bonds fast with Speed-o'-Sound Sonic after he saves it, and it stays glued to his side through his training, a sign of deep loyalty toward anyone it takes to. That devotion holds even when remaining with Frank places it in real danger.

In the OVA titled The Ninja Who is Too Complicated, a large snake sets upon the piglet before Sonic, training nearby, cuts the reptile down and treats it as a handy practice target. He names the little boar Ino, a shortening of inoshishi, the Japanese word for boar, and brings it along as he works to conquer his fear of Saitama. Once his training ends, Sonic hands Ino off to Frank. At the campsite the piglet grows lonely without Sonic and senses something drawing near, which proves to be the bear that once scarred Frank. Frank is knocked out in the encounter, and Saitama turns up; he briefly considers making a meal of Ino, but the piglet flees, recognizing him from Sonic's training. Ino later returns to Frank as the sun rises over the wreckage Saitama leaves after killing the bear. Beyond ordinary animal instincts, Ino holds no special powers.