The Dementor

                                    

                                          
This is a chapter that explains Y/n's back story and powers. You don't have to read it but there are some information here that won't be mentioned in the book.
                          
I'll just put them in Italics-bold-underline so you don't have to read all of them.
                          
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Quote:         "I'm just an ordinary person who happens to be perfect."
                          
                                                                         Y/n
                          
Alias: 
Sempiternal Y/n
Eagle Sin of Death
Dementor
                          
Introduction: Y/n is a former thief named Sempiternal Y/n, with her childhood best friend and now boyfriend, Ban. She was a Holy Knight along with the Seven Deadly Sins. She was once a Sin herself (Eagle Sin of Death) but due to an incident that happened, she decided to stop becoming a Sin and just be a singular Holy Knight. This resulted in her being the infamous Dementor. 
                          
Ten years ago, she was framed for the murder of the Grand Master of Holy Knights, Zaratras, along with the Seven Deadly Sins. She decided to flee per Meliodas's order. 
                          


                          
Personality: Y/n is not a confident person. She puts on an act saying that she is perfect because her mother always said she was. Y/n knows that she is so far from perfection but says that she is to remember her mother. She is also an amazing liar. Sometimes.
                          
Y/n is funny, strong, smart-most days- very good at fighting but stays away from it most of the time. Although, if she knows she is needed, she puts on her best performance. She tends to get sidetracked a lot. She curses a lot to express her true feelings towards situations. Her best coping mechanisms are comedy and singing. She only makes jokes where she is the only one that understands it- calls it Earth humor. She is known to her friends for having a big heart. She's always ready to fight for what's right and for what she wants.
                          
Despite her sweet, loving personality and hatred towards violence, she insults her friends (Mostly Ban, Meliodas, and Hawk) and sometimes uses violence to show her love to them. Her relationship with everyone is very different. But everyone loves her and she loves them all no matter what.
                          


                          
History: Y/n is half-Demon, half-Goddess. Her Goddess side is not from Brittania. Y/n and her mother, Faye, were both from a different realm called Rthea. She and her mother(who was a Goddess) used to live in Camelot. On her seventh birthday, Y/n was killed by humans but was saved by her mother when she gave her powers, knowledge, and immortality to Y/n to save her on the brink of death.    
                          
She sent Y/n to Ravens before she could get hurt and Y/n watched her mother get brutally stabbed by Humans.

                          
She got the name Eagle Sin of Death was because she couldn't save people from death even if she knew she could. She felt as though that was the biggest sin anyone could ever commit.
                          


                          
Abilities and Equipment:
                          
As a Holy Knight and former Sin, Y/n is very very powerful, and strong. Her powers are stronger than all the Sins combined. It is unpredictable sometimes but it still has its limits. Like always, power always comes with a price. Whenever Y/n uses her powers, her energy is taken away. That's why sometimes the Sins don't let her use it during small battles because they all knew the cost. But if it is needed, she will use it without a care about the consequences.
                          
The costs of her using her powers are her being in a coma, and not knowing when she will wake up again. Or ever. Then again, she's an immortal, which only one of the Sins knows about.