Goodpuffer

GoodPuffer has the ability to create machines and various types of industrial technology. He also lives in the facility.

GoodPuffer has the appearance of an anthropomorphic pufferfish and is entirely yellow, with his torso being slightly brighter. He has spikes on his torso and possibly on his back, although they are not visible due to his design. He resembles an Arothron meleagris (yellow form) or a Takifugu pufferfish, which is his suggested species. His design has remained consistent and unchanging. Although mostly hidden, GoodPuffer does have fangs.

GoodPuffer is highly focused on his work and appears indifferent to many things. Angered has described him as attempting to come across as "someone who doesn't care," suggesting that GoodPuffer finds it unnecessary to dwell on feelings and emotions. Despite this attitude, GoodPuffer clearly cares for his friends and those around him. He is particularly protective of AngeredFish and safeguards him in dangerous situations. GoodPuffer also seems to care deeply about nature and the living environment around him.

On multiple occasions, GoodPuffer has been seen taking care of and showing affection towards animals, specifically fish. He ensures that Fuel Egg has a room with a natural environment mimicking Fuel Egg's original habitat. GoodPuffer takes care of Joel and Moh, despite Angered's protests. However, GoodPuffer is also fearful of his own emotions and his trauma, especially when it comes to GratefulSalmon. This is shown in "think harder", where he shivers in fear after experiencing a vision triggered by a painting of GratefulSalmon. GoodPuffer appears to struggle with his emotions internally.

When alone, GoodPuffer becomes bored quickly if he isn't working on something. He is extremely intelligent, responsible for the entirety of the facility and its technology. One notable aspect of his behavior is his broken English, similar to AngeredFish, which is caused by the trauma he has experienced. This also leads to random flashbacks and visions.

GoodPuffer has expressed a disliking and sometimes hatred for humans and humanity. This is most likely due to what little he sees of humanity being generally bad, finding things such as harpoons. Good has also suggested that he is aware of what oil is.