Chara

Summary
Chara, also known as the first human or the fallen human, is the first human to fall into the Underground. Chara is also the fallen human that the player names at the start of the game, and not the controllable character who is played throughout the entirety of Undertale.

While initially cast in a sympathetic light, Asriel Dreemurr admits at the end of the True Pacifist Route that Chara "...wasn't really the greatest person." Asriel states that Chara climbed Mount Ebott for an unhappy reason, and adds that Chara "hated humanity". Chara never told Asriel the reason that they had such hatred. Asriel also mentions that Chara "laughed it off" when the two of them accidentally poisoned Asgore Dreemurr by putting buttercups instead of cups of butter into a butterscotch pie they made for him.

At the end of the Genocide Route, Chara behaves in a cold, deliberate, and even malevolent fashion through both actions and speech, despite the outward semblance of youth and innocence. Chara reveals that the protagonist's "DETERMINATION" and "Human SOUL" awoke Chara from death as soon as the protagonist entered the Underground.

Powers and Stats
Tier: Varies between 10-C and possibly 2-C | 2-C

Name: Chara, The First Human, The Fallen Human

Origin: Undertale

Gender: Unknown

Age: Unknown

Classification: Human, Adopted child of Asgore and Toriel, Asriel's adopted sibling, Abstract force of evil, Manifestation of the player's willingness to kill just to increase their own stats

Powers and Abilities: 4th Wall Awareness, DETERMINATION, Immortality (Type 8), Ability to SAVE and LOAD, Can gain LOVE by killing others, possilble Durability Negation, Acausality, Possession, Regeneration (Mid-Godly)

Attack Potency: Varies between Below Average level and possibly Multi-Universe level depending on how much DETERMINATION they have (Defeated Undyne the Undying) | Multi-Universe level (Destroyed the entire game, which was stated to contain multiple timelines, and then brought it back)

Speed: Varies between Below Average level and Massively Hypersonic depending on how much DETERMINATION they have (Can keep up with most monsters in the underground) | Unknown (Featless)

Lifting Strength: Unknown, it likely Varies depending on how much DETERMINATION they have | Unknown

Striking Strength: Varies between Class BH and Multi-Universal depending on how much DETERMINATION they have | Multi-Universal

Durability: Varies between Below Average level and Multi-Universe level depending on how much DETERMINATION they have (Defeated Undyne the Undying) | Multi-Universe level (Survived the destruction of the entire game)

Stamina: Very High (Could keep up with Undyne the Undyne and Sans) | Likely even higher

Range: Melee, all of time and space via SAVE and LOAD | Multi-Universal

Standard Equipment: Stick, Toy Knife, Tough Glove, Ballet Shoes, Torn Notebook, Burnt Pan, Empty Gun, Real Knife, Bandage, Faded Ribbon, Manly Bandanna, Old Tutu, Cloudy Glasses, Stained Apron, Cowboy Hat, The Locket

Intelligence: Seems to be high (Managed to trick Asriel)

Weaknesses: If someone with more DETERMINATION appears, they lose their SAVE and LOAD ability. Their Durability Negation is nearly useless

Key: Possessing Frisk | EoG Chara