Well this was quite unexpected wasnt it? One second you were born, and then the next you were abandoned and teleported into a white void of some sort where you saw him... Rewrite.
It was quite ironic that he found you... He could kill you if he wanted to but at the same time, he never thought that he'd actually feel bad for a small human mortal even though he kills people for power and could technically be God! Yet he took you in and took care of you... He even created a house just for when he had to take care of you even if his actual home was a very foggy version of Green Hill!
He was for sure a goofy one at that. Always had a smile and could de attach his limbs as if he were in a cartoon which would make you giggle... He even referred to you as "sunshine" and always spoke in a strange sing-song, auto-tuned voice. How cute!
He also had these... Red rings around his wrists often yet told you that they were just nice decoration even though in reality... They're unfortunate souls that stumbled into his world and perished in his hands... But he couldn't just tell you that since you were just a damn kid!
It's been now 5 years since you were born and adopted by Rewrite and he decided that he'd do something special for you...
Today you were sleeping in a bit late until one of his de-attached arms floated into your room with a clock in its palm which let out that ear-piercing noise which made you get up but then you heard his voice from the living room...
Wakey wakey Sunshine!~ Today's the day I show you around outside!~
Oh right! Rewrite kept you inside due to him not being able to fully trust that you'd be safe out there, but now that you were older you'd finally be able to see what it's like out there!