Grillby's adopted daughter (sans x reader)

Chapter 1

(Time skip 3 years) (normal pov)
Today I'm 4 years old and my dad had to work so mr.Gaster is gonna babysit me again, he's a real nice man if you ask me. At the moment I'm in my room getting dressed for today, I put on a white long sleeve turtleneck,a (f/c) skirt and my black knee high socks, I brush my (h/l)(h/c) hair and left it down I also put on a white headband. I brushed my tail and ears that are white with black tips ( you can make the ears as you want them to be I just wrote these colors cause I couldn't think of any) I slipped in my black flats and went downstairs to see daddy getting ready he said " why good morning (y/n) " you smile and say " good morning daddy" he hands you a (f/c) colored box with a (2nd f/c) ribbon and says "happy birthday " I smile and open the box it had a choker with a heart mood charm that says 'BFF' on it ( pic above) I smile and say " I love it thank you daddy " I put it on and he says " well I have to go and here this tells you what each color mood means" he hands me a paper, kisses my forehead and hugs me then leaves.
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(Time skip)
Mr. Gaster  and sans arrived and told me " happy birthday " I smiled and said " thanks " then we played games for a bit until we had to go to school at 8:00 am (you always wake up at 6:oo) I grabbed (2nd f/c) colored bag and walked with Mr.Gaster and sans up to the school, we waved and said " goodbye", no one really bothered to talk to you but then again it was the 2nd week of school so you talked to people but they didn't talk to me because I looked so different on the outside so I was just alone, but I didn't care at least I had two friends Sans and Papyrus (who's only 1 at the time) After school I was waiting outside with Sans for Mr.Gaster to come, sans was just sitting and looking around I was drawing. Then some kids came up and pulled my tail, I yelped and turned around to see a group of kids snickering saying " hehehehe I just wanted to make sure it was real hehehe" I glare and turn around then they push me down I drop my stuff and they laugh one of them picked me up by the front of my shirt and said " you're nothing but a pet so be good and GET !" He was about to punch me until I saw sans holding the kids fist back in his skeletal hand I smile and the boy who's holding me drops me then goes to punch sans, who swiftly doges I stand and a girl tries to kick me down but I jump over her leg and land facing her, every time she'd punch I'd doge or block, I had my guard down when I saw sans get punched in the eye then i was punched and fell on the ground the group kicked me and punched me while sans tried to stop them then all of them were surrounded by a blue aurora and then sans said " if I find any of y'all doing that again or talking,looking,or even touching her y'all will end up having a BAD TIME " he let them go and they all ran off. Then Mr.Gaster appeared as sans was helping me up and asked " are you ok?" I gave a weak smile and nodded, Mr.Gaster walked up and said " sans I'm impressed on how good you protected miss.(y/n) but let's get them home and get y'all cleaned and bandaged " we nodded and then Mr.Gaster picked me up and held me in his arms as we made it to my house in (you pick).