Chujin Ketsukane

Chujin is said to have been a kindhearted and hard-working monster,[2] as well as a good mentor.[3] He was also an incredibly talented carpenter.[4][5] His philosophy was that even though monsterkind is in a bad spot, being sealed off from the surface, monsters can collectively make the Underground a better place through small acts of kindness.[6] This is reflected in his actions, such as making a heater for Honeydew Resort and teaching Martlet construction without expecting pay. Nearly everyone who talks about him highlights his kindness. Even Starlo, who had the lowest opinion of Chujin out of all the main characters, respects him.[7] On the other hand, Chujin believed that humans are dangerous and cannot be trusted. This is a belief he held because of knowledge about the war between humans and monsters and, later, the Snowdin attack in which Kanako was involved.[8] Much of his work is focused on weapons against humans, such as Axis, who had gone through a number of models before the Snowdin attack ever happened, and his serum to turn regular monsters into Boss Monsters. Despite this, in his secret videotape, he seems conflicted over the fact that Axis accidentally ended up killing Integrity, the blue SOUL human.[9] In his tapes, Chujin is shown to have been arrogant and stubborn. He does not admit to his mistakes and hides his firing from Ceroba,[10] as well as his plan involving a human SOUL from everyone until his death. He is adamant about his plan being the key to saving monsterkind, and uses his dying wish to burden Ceroba with finishing it.[11] Chujin was also implied to be poor at communicating beyond just hiding his mistakes, particularly with Ceroba. They are implied to not have discussed basic plans for their relationship, such as how many children they wanted.[5]