The moment I woke up, I realized I was drowning in water...no...this wasn't, it was a thick water-like liquid and I wasn't drowning. I was just floating in it...and when I tried to move, my hands hit something hard like a wall, but it was way too smooth to be a wall. And the moment I applied a little pressure on it...it cracked...
...and was how I, Acedia; The Noonday Demon and one of the Seven Deadly Sins was born.

I met the other Deadly Sins and worked with them to achieve world peace. I ordered my men to infiltrate the human realm and rob them...Ahem! I mean...do legal business with them and force them to depend on us for the rest of their lives.
Yes! I made them slaves for an easygoing life where they'd beg for me to spare their new lifestyle!

And then I became an adventurer myself and infiltrated the human realm to have fun...Ahem! I mean...to survey the human realm with my own eyes. I made a lot of friends, fought a lot of foes, and awaited the fated encounter with my loving soul mate.
...The hero who shall kill me one day...isn't it dreamy being killed by a pretty girl you're in love with?

PS. I have no specific gender by the way, but I look like a girl for the most part...