Secrets and answers (Rin okumura x Oc)

New student

"What your doing Yukio, I heard there's a new student?!"
"Rin stop being in my business all the time."
"What gotta problem with it four-eyes?!"
He sigh and started talking "listen Rin you'll see when you get there..." He looked at Rin up and down with an annoyed face. "Why aren't you dressed, Rin" Rin took off and started to change quickly.
"5 more minutes, Rin."
"Holy crap!"
He ran to the kitchen, ate his food, and started walking with Yukio.
Rin caught up to the garden until Shiemi popped right out the garden to the twins. "Yuki, is it true that their's another student!"
Yukio slowly turned his head to Rin in a what the heck face.
Time skip (at school)
My hair flowed though the halls with my ponytails on. I looked at the dog to where he stop at. The dog transformed into the purple hair man from before. My eyes widen in shock and bowed down. "Thank you for the invite, Director!" I tried to be polite like my mom always say 'If you don't get the noodles, you won't get ramen.'
"Please call me Mephisto, Saki."
Everyone someone calls me that, all I can remember is the pain.
"Please call me, Yuko." I said walking to the door. He gave me me a smirk "you're just like your mother clumsy, but graceful. Also fun and beautiful. And you father, determined, brave, and protective."
Ok, I'm confused? How does he know about me and my mom?! Sure he knows dad, but my mom?
"Well you better go in your late after all."
Oh yeah!
I looked back to the door, yet I forgot to give him something. But as I turned around, he was gone.
I slowly walked into the classroom, while everyone was staring at me.
"This is one of our new students, please introduce yourself."
Students?
"I-I'm Saki Maruyama, but people call me Yuko. My parents are dead cause-"
Come on think, I just can't say 'Oh my dad got possessed and killed my mom. While I seen blue and red flames clashing each other. And got burned by my stepmother and it still hurts, and make sure no one sees it.'
Yeah, no.
".....They was ill, I got a sibling who I never meet. And I want to be a knight and a Tamer, thank you."