History
Skwisgaar was born and raised in a logging town somewhere in Sweden. He was raised by his single mom, and grew up never knowing his father. His mom was very promiscuous, causing Skwisgaar to be traumatized at as an adolescent when he accidentally walked in on her having a threesome. After seeing this, he fled the house and ran off into the nearby forest. There, he accidentally fell into an underground cave after being chased by wolves. Young Skwisgaar found his guitar, a Gibson Explorer, in the cave; this proved to be a huge source of comfort and a great escape all throughout his life. He grew up playing music as a way to express his hatred for his mother, and quickly became very talented. This is the last we really know about his childhood and life until Dethklok.
After many brief stints in many bands, Skwisgaar finally ended up in death metal band Dethklok as one of the original five members. He soon became their lead guitarist, and was given the title 'fastest guitarist alive' by a Harvard think-tank. As time went by, Dethklok grew in popularity until it became the greatest cultural force in the world. Canon states that it has amassed an army of millions of fans willing to die for the band, thus making Dethklok even stronger. Because of his role as lead guitarist, Skwisgaar is one of the most powerful men in his world, even if he doesn't seem to realize it.
Along with tremendous success, Dethklok has also made terrible enemies. Throughout series two, an anti-Dethklok terrorist organization simply known as the 'Revengencers' conspire and plan the band's downfall. The group is shown planting bombs in Dethklok-promoted places (mainly a chain of coffee shops), killing and injuring hundreds. The group grows to form an army, and they launch a full-scale attack on the band's CD release party in the season two finale. Skwisgaar and the rest of Dethklok make it out alive, but their mansion/fortress Mordhaus lies in ruins and the fate of the band is unknown.
Dethklok causes chaos and destruction everywhere they go, and accidentally leave hundreds dead in their wake. Despite the constant life-threatening danger he is in, Skwisgaar makes it out of every scrape unharmed and still (relatively) mentally stable.
The only reason he has not died in canon seems to be because of the Dethklok Prophesy. The band is destined to bring about the end of the world in an 'apocalypse of metal' (a 'metalocalypse'), and apparently cannot die until they have fulfilled this. Skwisgaar and his band-mates have no idea of the prophesy. The show itself has revealed little else about the prophecy, rendering it a mystery to the viewers, as well.