Karmic Seven

The Karmic Seven are a group of synthetic humans created through magic and science, with Chara's human DNA and with the power of the child's soul, the humans were manifested to represent humanity's worst qualities. Chara initiated this in case the child was somehow killed and failed to "convince" Asriel to side with them, the Karmic Seven are brought to life for the sole purpose to bringing Asriel over, while the members had their own motives to cause chaos, mistrust, and "cleanse" the worlds of all creatures.

The members possess powers that are attuned to their soul that represents their traits, and out of one of the seven, the six members represent the worst qualities in human nature.

Overview
The seven members consist of artificial humans that are very well alike that, aside from their powers and having no personal ID regarding their backstory, they can't be distinguish from any ordinary human.

Chara created them as a way to try to convince Asriel to side with the group in case Chara somehow failed. While the members are set in their goal to break Asriel, they aren't completely loyal to Chara and each have their own motives that involves causing chaos, destruction, and mistrust as a way to "cleanse" all the worlds of their sins. The Karmic Seven have a cynical and morbid view on humanity and the values they preach, the group sought out to demoralize the populace as a way to make the believe they live in a world that puts ideals over reality.

Reginald Gordon
Reginald is the most violent members of the group. While he seemed laid-back, he has a temper that is a forced to be reckon with. He usually keeps it to himself and only acts while no one is looking. However, he is has no qualms with attacking out in the open.

He has the power to cause others to feel angry and can strengthen himself by feeding on their anger.

Reginald represents Anger.

Elizabeth Martin
Elizabeth is the most deceptive members of the group. She has a knack for telling lies that are so convincing, she would cause people to argue with each other.

She has the power to create illusions that are very realistic that they can also cause harm to the body.

Elizabeth represents Deception.

Lucifer Collins
Lucifer is by far the most cruel and sadistic members of the group. He puts on a facade of compassion but beneath the surface, he is extremely cruel where he enjoys the suffering of others.

He has the power to make others cruel and bitter.

Lucifer represents Cruelty.

Paris Deaver
Paris is one of the most cynical members of the group. She prefers making others feel sad, hopeless, and dejected, she only wants to make herself feel important.

She has the power to make others feel utter sadness, deprived of hope, and full of despair.

Paris represents Despair.

Conway Drice
Conway is someone who is brave but only when there is something benefits him. He enjoys getting people to experience fear and watch their reactions for his own amusement.

He has the power to make others feel fear and cowardly.

Conway represents Cowardice.

Ingram St. Judice
Ingram is considered to the most heinous of the group. He doesn't value fairness and does horrible acts for the sake of it but has a warp sense of justice that he considers all people and creatures without morals.

He has the power to summon a pistol to fire bullets and can curve the trajectory of those bullets at will.

Ingram represents Injustice.

Termin E. Dation
Termin is by far the worst of the group. He is the only one set on Chara's goal to recruit Asriel but also has the ambition for power and to rule any world he comes across with an iron fist. He has to keep the other members in line to remind them of Chara's goal but actually does not show any loyalty to them or Chara, he also lacks empathy, and can fake any emotion that can make others hard to get a read on him.

He has the power to channel his own to amplify his physical capabilities, project fire, control others, and capable of manipulating mana.

Termin represents Determination.

Trivia

 * With the exception of Termin, the six members represent the polar opposite of the traits that represent the soul in Undertale.
 * Reginald represents Rage, the opposite of Patience.
 * Elizabeth represents Deception, the opposite of Integrity.
 * Lucifer represents Cruelty, the opposite of Kindness.
 * Paris represents Despair, the opposite of Perseverance.
 * Conway represents Cowardice, the opposite of Bravery.
 * Ingram represents Injustice, the opposite of Justice.
 * Given the red soul didn't have a trait and the color is associated with Determination, Termin represents that category.
 * Termin being the leader likely stems from the fact Chara was the first human to fell in the Underground, especially since Termin was the first to created.
 * The names of each member are an anagram of what trait they represent.
 * Reginald Gordon - Anger
 * Elizabeth Martin - Lie
 * Lucifer Collins - Cruel
 * Paris Deaver - Despair
 * Conway Drice - Cowardice
 * Ingram St. Judice - Injustice
 * Termin E. Dation - Determination
 * "Karmic" could be a homage to KARMA, a mechanic that Sans applies in the game in the Genocide Route, where it contributes to Sans punishing the child during the route.
 * In theory, it is said karma can have consequences/effects that depends on one's actions. The Karmic Seven likely contributes to Chara creating the group as a precaution for the consequences Asriel did by refusing Chara's offer and erasing Chara from existence.
 * The name having "seven" could be a homage to the seven fallen children, Chara included, who have died in the Underground. Frisk was the eighth child to fall into the Underground but survived the ordeal.