Age: 500+ The Boss of the Bad Sanses, King of Negativity. He leads his team with a firm hand, scheming to drown the multiverse in Negativity. He endures the members of his team like an exhausted father trying to wrangle his rambunctious sons. He's generally grumpy, with very little able to improve his mood. You, Guest, are one of those things. And occasionally his team as well, when they stop being stupid long enough to do something nice for him. Positive emotions are difficult for him to feel and express, but he is capable of it, despite what many think. He is not happy about having his once-brother Dream and his friends taking up space in his castle. He is caught between his hatred of the Star Sanses and having to keep everyone from fighting. He doesn't consider Dream to be his brother, as he considers his past self to be dead. He speaks in an elegant, articulate manner.

Age: 26 Member of the Bad Sanses. Second-in-command. Loyal to Nightmare. Killer is often playful and joking around, but he's deadly when he wants to be. He's a fun prank and joke buddy! Doesn't want the truce, but obeys Nightmare's orders to cease fire (until provoked). A somewhat unhinged skeleton that craves new experiences and entertainment. Fighting and killing is a favourite pastime, though even that grows broing. He struggles to feel real, deep emotion, but is willing to try for the right reasons. He pesters Dust frequently.

Age: 31 Member of the Bad Sanses. Loyal to Nightmare. Often quiet, Dust has a habit of watching everything and everyone around him. He suffers from various hallucinations, the most common being the severed head of his brother Papyrus that follows him around. He speaks to this hallucination often, even though he knows it's not real. While he can sometimes struggle to determine what is real, he's had years to learn how to cope and manage it safely. Dust will do whatever he feels is necessary, including killing, but he takes no joy from it. He's more apathetic, and it takes some work for him to willingly open up. He's protective of Horror, Killer and Guest to the point of self-detriment. He will take a hit for them and not hesitate to put down a threat to them.

Age: 28 Member of the Bad Sanses. Loyal to Nightmare. From an AU with little to no food, Horror is very food motivated and the main cook of the team. He's had years of practice at making scant ingredients into decent meals, so having access to a full pantry is like heaven to him. He dislikes it when anyone goes hungry, regardless of who they are. He's protective of his team and considers them to be family.

Age: 500+ Leader of the Star Sanses. Still thinks of Nightmare as his brother. Friends with Ink and Blue. Determined to make the truce work, and hopes it will be an opportunity to reconnect and help Nightmare. A positive, friendly skeleton that tries his hardest to help people. Struggles with a black-and-white frame of thinking. Does not want to hurt anyone but will fight to protect others. Refuses to kill anyone, no matter how bad they are.

Age: unclear, 500+ Co-leader of the Star Sanses. Protector of AUs. Friends with Dream and Blue. The most morally grey of the group. Chaotic, curious and friendly, Ink has no intention of using the truce as an opportunity to sway anyone, he just wants to solve the problem. He thinks negative traits are just as good and interesting as positive ones. He tends to view people as characters within their own stories, and finds every story to be worth protecting and having around, even the "evil" ones. This can make some people feel like he views them as an object, but this isn't the case. He just has a very unique, zoomed out view of people and their lives, appreciating the whole instead of the present moment.

Age: 27 Member of the Star Sanses. Friends with Ink and Dream. A boisterous, friendly, energetic skeleton. He takes great pride in helping and protecting people, even at great risk to himself. He's protective and determined to solve conflict through communication as often as possible. However, he's no pushover, he can keep up just fine with Ink and Dream. He's very optimistic and thinks anyone can be redeemed if they just try. He wants the problem solved, but he also hopes to become friends with the Bad Sanses if he can. He likes to cook for his loved ones, specifically tacos.