So this is a the bio for my oc, eyeless Seth. It's creepypasta based but also undertale based so ill just get right into it!

Story: Seth was an orphan, never knowing who is parents were and had a alright childhood...that all changed when he climbed mount ebbot. When he fell in he made so many friends! They shared laughs, cherished memories, and found a family...but then...something happened...a demon appeared on the scenes...chara...1 day Seth was just relaxing at his home in the ruins then...he felt like...he couldn't control himself...he made movements that wernt his own...and spoke words that wernt his...chara was now in control. Under charas control Seth, unwillingly killed everyone in the underground, then after it was all over, chara gave Seth control again and tried to kill him and left him for dead. But he survived and woke up later, all cut up, Seth picked up sans jacket and papyrus's scarf and put them on, promising to find and kill chara and to bring all his friends back, he grabs the seven souls and absorb them, giving him immense power
(I'm sorry if this is bad, I'm not good at writing stories I'm just giving a simple summary)

After a whole year of searching Seth finally finds chara and kills her, then takes her soul and returns to the underground. Seth uses the power of the souls and charas soul to bring everyone in the underground back to life, and takes away his powers In the process, he then leaves the underground, feeling he has caused enough trouble in everyone lives and feels like it's his fault for what happened. He then goes to live in a small house in the woods, sad.

After a couple months Seth can't take it anymore...the guilt...the loneliness...he wants to end it all...he leaves the house one day and goes to the middle of the woods, a rope in hand...at night Seth is read to do it, the noose is ready and he has a chair, but then...he feels like something is watching him...no...stalking him...Seth turns around to see a terrifying sight!
...it was eyeless jack...Seth had heard the legends about the famous killer and everything was true...the mask...the agility...the eyeless mask...Jack lunged at him and Seth and Jack struggled for awhile but Seth ultimately was defeated and Jack stabbed into his eyes. The pain was like nothing Seth had ever experience, after a minute they pop out of his eyes and Jack shoves some black substance into his eyes, In a attempt to turn Seth into a proxy or servant but it did not work, instead the only thing that happened was Seth's blood curling screams as the substance was shoved into his eyes, Jack then left Seth for dead, accidentally leaving behind his knife. Seth woke up after a couple days and he saw in some water what he had become, his eyes were gone...and in there place was black gaping eye sockets with a black substance dripping out, Seth fell to the ground crying the black substance then after a couple days of crying and adjusting to his new sight he decided something: he wasn't gonna kill himself anymore...he was gonna hunt down the monster that did this to him and when he finds him...there will be nothing left...
He picked up the knife jack left him and dawned a black hoodie and pants and set off on his trip,
"I'm coming for you jack...be ready..." he said

Seth's personality:
Seth is a loner, he has a hard time making freinds cuz of his eyes but does have some freinds. Seth is very thankful for his friends cuz he has Autophobia, the fear of loneliness cuz he lost his freinds in the underground which threw him into his depression and his attempted suicide, he also has atychiphobia which is fear of failure, this is also from his time in the underground cuz he feels like he failed his freinds cuz he was weak, this causes Seth whenever he disappoints his freinds or hurts them emotionally or physically to cry uncontrollably and have a complete mental breakdown. He takes offense when his eyes are insulted but he's learned to ignore it. Seth does kill people sometimes but acts on a strict moral code, he only kills people to protect his friends, he only kills murders, rapists, and people who try to hurt him but most of the time when someone tries to hurt him he just breaks an arm or leg.

Hobbies: likes to hang out with his freinds but when he's alone he likes to play video games, watch YouTube and he actually likes gardening, he's not really good at it though so he gardens with destiny, his favorite flower is black and white roses but he also likes very colorful flowers. He occasionally likes to pull pranks, he mainly pulls pranks on rev (but when he does he gets a broken arm for a week), and bloody and echo.

Abilities: Seth now has the powers that eyeless jack had and some powers he got from his time underground: amazing agility, he's, very fast, has some knowledge of combat but always trains to get Better at it, he can summon gaster blasters though it drains his energy, and teleportation but this makes him sick and puts him in a near death situation. He has the ability to travel to aus but prefers not to, they remind him too much of his own family. The only time he goes to an au is when he's super depressed in which case he goes to reaper tale and hangs out with reapertale frisk, they bring him happiness

Motives: to find and kill eyeless jack after that...he wants to have a peaceful life but feels that's a privilege he won't get...

Appearance: height (you choose), Brown hair, wears a black hoodie and pants, or sometimes white when he's in a really good mood, has several scars on his chest and back from occasional battles against Jack. And of course the gaping black eye sockets that leak a black substance
Relationships

Destiny: saved him from being killed by jack during one of there fights They get along very well and is probably Seth's closest friend
pompomcute1 echo: his 1st friend, he met her when he needed more eye wraps and the 1st person he showed his eyes too, they get along well and she always comforts him when he's sad
Eyeless jack: sworn enemy and the one who took his eyes, he wants to kill him and make sure there's nothing left to bury
Slender man: not his enemy but doesn't like him cuz eyeless jack is his proxy, as long as he doesn't stop him from killing jack they'll stay on nutreal terms
Jeff the killer: he greatly disturbs and freaks out Seth because of his face, whenever he sees him in person he either freaks out and runs away or starts crying and hiding,
Jane the killer: likes her cuz she wants to kill Jeff, helped her once by tending to her wounds then left, not wanting to make Jeff his enemy he told her to not tell him how she survived
The scp foundation: Captured him once and named him scp 4000, he hates them for capturing him but doesn't attack them but instead just stays away from them, not wanting to be experimented on again and doesn't want them as an enemy
Aqua: echos adoptive daughter, he really likes her and she always manages to cheer him up when he's sad, he likes to play with her and she calls him uncle Seth
Halley: there good friends and is very protective of her and her daughters, feeling compelled to help them whenever there in trouble,
Blood: more or less aquatinteces, not much to be said about the 2 except when she got kidnapped he was willing to try and save her
Shadow: there sometimes friends but other times just acquaintances, he made her cry and freak out once and he felt terrible for it
Silver: the friend/ second half of echo, whenever she takes control of echo he tries to either stay out of her way or not talk around her, they got in a fight once and it ended with Seth have a broken arm for a month with destiny taking care of him
Kiki and rose: daughters of Halley, he likes the 2, not much else to be said
Nebby: LilSisDream s oc and his girlfriend, not a lot of information to add right now but will be added later
Rev: @LilSisDream s She doesn't really care much for Seth because of the fact he is in a relationship with her sister but would still fight to protect him, her sister, and her niece Dierra
Dierra: The young daughter of Seth and Nebby she is a black Wolf Neko she has her fathers previously green eyes she is normally cheerful but is serious when need be and has the ability to sense peoples emotions and change into a wolf like her mother and her eyes acasionly leak like her fathers
Bloody: one of his closest freinds, they were both captives in the scp foundation along with bloodys daughter maymay
Maymay: bloodys daughter, they get along well and likes to spend time with her
Lust: more or less aqquatinces. He wants to be friends with rev so he tries to be nice with him.

(Tell me what you think in the comments! Always appreciate your thoughts!)