Pesu is the name of a giant wild beast alien that appears in Gintama. It was defeated by Gintoki at the first part of story.
Powers and Stats
Classification: Alien, Wild beast
Powers and Abilities: Superhuman Physical Characteristics
Lifting Strength: At least Class 5
Striking Strength: Small Building Class
Durability: Small Building level
Range: Several hundred meters with Tentacles.
Standard Equipment: None
Intelligence: Just like wild beast.
Weaknesses: None Notable
Tentacles Attack: It has many octopus like tentacles that it can use to walk, grab and attack.