Pesu

Pesu is a giant octopus-like alien and the "pet" of the Amanto Prince.

Character Outline
After escaping his "owner", Pesu goes on a rampage throughout Edo. During an argument between Gintoki, Shinpachi, Taizō, and the prince, Pesu attacks again. The prince explains that Pesu is an unknown alien he caught on the planet Hikyō. Gintoki then draws his sword and prepares to attack the creature. Taizō stops Gintoki by tripping him, saying he is to catch it unharmed, but soon after, Shinpachi is ensnared by one of the creature's tentacles.

Gintoki prepares to go to his rescue, causing Taizō to draw his gun. He tells Gintoki to let Shinpachi be a sacrifice to the beast, to which Gintoki replies that they are rotten for suggesting that. Taizō explains that even if it's rotten, he will save the country in his own way, causing Gintoki to smirk. He kicks the gun out of Taizō's hand and says that in the same manner, he shall do things his way. He attacks Pesu, rescuing Shinpachi by cutting the creature's throat open with his wooden sword. The prince flies into a rage over the condition of his pet, stating that it will be Edo's problem now. He then tells Taizō that he will report to his father, causing Taizō to punch him and yell for him to shut up.