So this is a bit of a weird one, truthfully Dandadan is a series a quickly fell in love with. I appreciate its fun characters, weird scenarios, and its focus on telling a fun story. So I figured I'd make it a bit more chaotic by adding in a bunch of sharply dressed Demons Girls! Honestly this idea is based solely on having fun. With that being said, let's meet the Helltaker himself!

Name: Junpei Ayase

Age: 18

Hair Color: Auburn

Eye Color: Brown (Originally), Red (Contract Side Effect)

Height: 5 Foot, 11 Inches

Family: Momo Ayase (Little Sister), Seiko Ayase (Grandmother)

Occupation: Student, Paranormal Investigator.

Personality: Serious, dedicated to combating the supernatural and extraterrestrial, cares about his sister and grandmother, unsure of Beelzebub, a bit uneasy about contracting Demons, feels bad for Okarun getting dragged into his family's line of work.

Equipment

Seven Circles Grimoire: A Demonic Book that has been with Junpei since he was a child. Originally disguised as a simple mythology book, it revealed its true form on Junpei's Eighteenth Birthday. The Grimoire is in fact a representation of Junpei's contract with the demon Beelzebub. With it Junpei can form contracts with the Demons of Hell and summon them to his side. It also allows him to communicate with Beelzebub.

Abilities
Immense Durability: Being trained by his grandmother to combat the paranormal, Junpei is incredibly durable compared to the average human. He can shrug off blows from both Aliens and Yokai, all while continuing to fight.

Enhanced Reflexes: Another result of Junpei's training, he can react to and dodge the attacks of Aliens and Yokai. This also allows him to counterattack without needing to think.

Enhanced Stamina: Junpei has far more stamina than average humans his age. Able to run for miles without tiring, prolonged fights also do not wear him down easily.

Weapon Master: Due largely in part to his Super Natural Abilities, Junpei has a deep understanding of most weapons and can use them to great effect.

Supernatural Abilities
Demonic Soul Weapon: Junpei can harness the power of the souls of Demons he forms contracts with, turning their bodies into weapons. The weapon depends heavily on the Demon in question, furthermore a side effect of the wielding these weapons is that Junpei himself takes on personality traits of the Demon.

Contract Formation: Junpei can create a magic contract with the pages of the Seven Circles Grimoire. Once a Contract is formed, Junpei can summon the Demon in question to his side. However the Contract requires that Junpei give something to the Demon before he can utilize their power.

Supernatural Radar: Junpei through Ki can sense paranormal activity from potentially hundreds of miles away. This tends to take the form of headaches that grow worse in intensity the closer Junpei is to the supernatural entity.

Bio: Junpei Ayase unlike his little sister was made aware of the existence of the supernatural and extraterrestrial from a young age. In order to let his sister live a normal life, Junpei underwent training with his grandmother in order to help combat the many supernatural happenings in Kamakura. Having the supernatural ability to sense the supernatural like radar, Junpei was instrumental in keeping supernaturals in check. However on his eighteenth birthday a mythology book his grandfather gifted him transformed into a Demonic Grimoire. Now holding a contract with the demon Beelzebub, Junpei finds that his supernatural abilities are far beyond simple radar. With his little sister and her classmate getting dragged into the strangeness of the town, Junpei must form contracts with other Demons to help combat this threat. This however sounds like it will cause a whole new type of headache for the young man.

Name: Beelzebub

Gender: Female

Age: Millions of Years Old

Hair Color: White

Eye Color: Red

Title: The Great Fly

Personality: Grandiose, self-absorbed, curious to see if humanity can survive against the Aliens and Yokai, find Junpei interesting, enjoys flirting with Junpei, hopes to one day be free from the Abyss.

Bio: Beelzebub is one of the strongest demons within Hell and potentially the most dangerous. She was cast into the Abyss by Lucifer after she attempted to overthrow her and stole the Seven Circles Grimoire. During one of her many escape attempts, she encountered Junpei and Momo's grandfather. Despite the man thwarting her escape attempt, she was willing to strike a deal with the man. Forming a contract within the Seven Circles Grimoire, Beelzebub gave it to the man, stating that whoever he gives ownership of the book to shall become her Master. Years later Beelzebub meets Junpei Ayase, her new Master. Now Beelzebub searches for a way to escape the Abyss all while assisting Junpei, who she has taken a deeper interest in than she expected she would.

So that's Junpei! Now before anyone says anything, yes combining these two series seems really weird. However both Dandadan and Helltaker are series that are all about weird and wacky stuff, therefore I think they will work. I don't expect this to be particularly popular, but I figured I'd throw the idea out there and see if anyone liked it. As always leave your thoughts and opinions in the comments! I hope to see some of you in the Prologue to Dandadan: The Helltaker!