William Hanson

William is a bright kid and diagnosed psycopath,

Lacking empathy for life in general, He ambushed and killed lot of survivors for experience before finally being killed by Jake.

Eversmile revived him, giving him second chance.

Personality
William is a smart kid any many ways but not in emotional sense or towards life in general. But also arrogant and delusional not understanding how the world works nor how people have their own emotions. He saw Tutorial as some game instead of considering the grim reality other than his own mortality. He always expects people to act logically like him without understanding how other things will affect them.

Pre-System Earth
Before the Tutorial, William had been a very bright child who was grand plans about future, But at the age of 12 his younger brother was born and William's problems started. He was born with severe defect and is always bound to wheelchair, Keeping him alive would require expenses, Expenses otherwise should have went towards William's University which destroyed his dreams.

This made William confused as he thought that his brother was lost cause and is to be left for dead, but his parents were very insisted on helping William's little brother, So one night William pulled out his 5 year old younger brother's life support and killed him indirectly.

William expected his parents to return to normal and consider this as an Accident of sorts, But his parents who were distraught took their rage on caretaker and company of the medical equipment. Even prepared for legal proceedings which would put their family to further debt, Seeing that this won't end well he confessed to his parents about how he killed his brother's life support, Which made their parents even more worried as they brought him to mental facility to help him recover, While still keeping the information of William's murder of his own sibling a secret.

But one of the psychologist who was treating William, Kim Eunseo found out about it. During his time in the Mental hospital he had been playing along with their treatment but in reality the routine process did not work for him as he found ways around the normal procedures, He hated everyone in that establishment.

Tutorial
Once the Tutorial started, He along with his doctors and nurses spawned together, He pretended to work with them but started killing one by one secretly and wiped out everyone in his group. When he joined Richard's group, He had continued the same tactics, but Richard had known this and used him to kill unwanted members. He saw people as potential experience points instead of actual human beings.

William wiped out a group in Richard's faction just when they were in talks with Hayden faction, spinning it off as Hayden's doing and started the war. He also killed Hayden's son and sent his severed head to Hayden, which caused even more bloodshed.

Eventually killing people stopped giving him decent experience so he turned his attention to smithing profession under Smith.

As his next target William was about to kill Casper but learned that the man know the truth and upon meeting, He disappeared from the Tutorial through a ritual. The confused William who was returning encountered Jake who just came out of the Dungeon. Unable to see his levels he tried to ambush him but got poisoned and fled instead.

When Caroline healed him, He told Richard about Jake, Later after failed ambush on Jake by Richard and Hayden, Richard killed Hayden and prepared to wipe out Hayden's camp. During this the smith called him, told the tragedy of his family before giving his life to make a armor for William.

William during the attack on Hayden Camp, After Richard killed Desmond, He turned on everyone as he massacres every other survivors present.

Jacob curious as to what happened in the battle inspects and finds William and Caroline's metal statue corpse, Clearly a skill by William, But instead of killing William he heals him and leaves the battlefield to await their fate, triggering Jacob to become an Augur.

Once William healed he heads towards Richard's camp to kill off rest of the survivors for his new quest, Finding Jacob in a similar position as Casper, He also activates something upon his death and leaves the Tutorial, Instilling further doubts and confusion in William.

Later when he finds Jake, He rants about his situation and laughs, Triggering Jake on killing him without letting him muster any ability to counterattack.

After his death, Eversmile revives him using Golden Leaf of Yggdrasil.

Recovery
The revived William became disciple and trained under Eversmile's time bending place, similar to how Jake trained using Villy's cauldron. Later realizing that he still had some trauma, He met Kim who at that time was about to be assaulted by some thugs, He saved Kim and her daughter. She agreed to help him in return to protect her and her daughter, And a Karmic bond was made using his unique skill.

Finding Kim's friend Mary and coincidentaly also finding Milas in a settlement. William helps them, later after learning that 10 Pylons are already claimed, He claims a Pylon after killing a D-Grade, Becoming a owner he let Milas to be the City Lord.

He lets Kim attend the World Congress, Who asks Jake to not kill William on sight.

After Treasure Hunt
While Earth's humanity were preparing for the Treasure Hunt, William had transported to outer Universes through means unknown and spent time on Nevermore, Where time passes faster inside without negative influences on records.

Gaining levels higher than any human on the planet, William sneaks into Skyggen and inquires Jake's parents and Maja about Jake using mental skill and when he exited, he activated traps to let people know that there was an intruder. Once Caleb returned from Treasure Hunts who learns of it, goes towards the direction of the intruder, Caleb himself was affected by the mind magic as he was lead elsewhere so William could not harm his comrades.

More to be added in the Future

Alternative Fate without Jake
After killing William in the Tutorial, The Malefic Viper explained to Jake that the original fate was for Jake, Lina and Dennis to die at their first night on the Tutorial, Richard's right hand Nicholas will betray him in the end and William will be the sole survivor after he mass murders everyone in the Tutorial.

All this would have happened if not for Jake's Bloodline.