Your quirk can make toxic come out of your hands and you can brink it back if you over use it you can pass out your sibling is Aizawa for the mark you have the same colour diamond that matches they're hair.

You walked to school with your brother since he was usually letting you walk to school alone you came home beaten up so he walked with you "I'm fine Shota" you told him "I don't care I'm just walking with you" he shot back making you roll your eyes "And take a shower or I'm taking your cat" you said "Your hair is greasy I don't like it" you said making him glare at you the same girls/boys came to you "hey loo-" they were cut off by the pro hero Eraser Head "I'm her older brother" Shota growled at them "You don't look like it" She/He said you pulled out a little brother/sister key chain you have with your brother "He bought it" you looked down and they were shocked so they ran past you guys "Thanks Shota" you thanked him "This is what I meant" he said "I didn't want to use my quirk next to you" you told him and you continued walking

You got to a school and sat next to your male best friend Shoto Todoroki, you knew him since your childhood "Y/n can I see your soulmate mark?" He asked and you nodded your head and showed him the mark he was shocked he showed you his and you were shocked as well "Are you sure it isn't Yaozorou?" You asked "She found hers" Todoroki said and you were relieved you were happy you found your found your soulmate your brother knew his and it was Hizashi,

At Lunch

You sat with the Deku-Squad but Todoroki sat next to you and Tsuyu "Y/n Kero" Tsuyu said "Yes Tsu?" You asked "Have you found your Soulmate?" She asked "Yup!" You smiled "Have you found yours?" You asked and she shook her head no "Can I see your Diamond?" You asked since you knew about them "Sure Kero" she said and showed you her mark "I know who it is" you smiled "Really? Who?" She asked "Who is the brightest and bubbliest person in the Deku-Squad?" You asked "Uraraka-San?" She asked and you nodded "Uraraka let me see your mark!" You said and Todoroki was blushing since your breasts were in his face "Oooh!" You smiled sitting back down looking at Todoroki "Are you okay?" You asked "Y-Yeah I'm fine" he said you looked confused but went with it "Lida can I see your Diamond?" You asked and he showed you his "I know who it is" you said sitting down "I must find out myself!" He put his arm stiff as a board making you smile "Todoroki are you sure your alright?" You asked putting your hand to his forehead to check if he has a fever but he was still blushing "I'm fine Y/n" he said moving your hand you nodded but you felt tiny hands on you making your body stiff Todoroki noticed this and looked behind you to see a walking grape "Y/n are you alright?" Lida asked "Yeah you are stiff" Midoriya said and he saw Todoroki grab someone from behind you and you were still stiff Todoroki got up and dragged Mineta making you calm again "Mineta just touched me in a weird way but my brother I will tell after school" you said "Who is your brother?" Uraraka asked "Promise not to ask him?" You asked "Yes!" They all agreed while Shoto knew who it was "It's Mr Aizawa I look like him but a happier version of him" you said "I knew you looked like someone!" Midoriya smiled making you smile back the bell rang.

After school

You walked home with your brother but you were being followed by the Deku-Squad todoroki had to go home right as the bell rang "Shota" you said "What" he said back "I found my soulmate" you told him "and I know yours" you said making him choke on his water "Holy you good?" You asked patting his back "yeah I'm good Y/n" he said "Tell me who it is" he said "Todoroki" "How do you know?" He asked "I know about this soulmate shit Shota, yours is Hizashi I can tell because all mights is someone else not you and he doesn't show anyone his only me and you" you explained "So the colour of the diamond on your wrist is the colour of their hair" you said walking "I saw Hizashi's and it was black you guys held hands in front of me which I laughed at" you said and he used his scarf to make you stop walking so he can drag you "Shota that hurts" you said "You still can't control your scarf" he said "Come on! Shinso can!" You complained "And he is my cousin but people believe he's your son!" You said "Yeah Yeah just shut up" he said tiredly "I'm making food tonight" you said before he did "Fine" he looked at you he left his scarf loose and you fell out the Deku-Squad watched the whole thing once you got into the house they came out of hiding and they were shocked that Todoroki was your soulmate you sat on your bed waiting for your brother to come back home so you played a song you like in your room you had Fairy lights you didn't hang up yet so you hung them up you walked out of your room to be greeted by a messy living room

'Thanks Shota' you rolled your eyes cleaning up the mess you went upstairs to put on a tank top since it was hot in your house '5:30' you thought and looked outside it had enough sun until 8 so you called Todoroki he picked up right away

"Hello?" He asked

"Hey Todoroki" you said

"Hi Y/n" he said back

"Are you busy?" You asked

"No" he said

"Good, Get ready and meet me at the mall" you said

"Okay?" He sounded confused

"Good hurry up" you said

You hung up and got ready

It was warm out so you wore that and got outside running to the mall with a piece of toast you made in your mouth your hair was in a high ponytail you ate the toast when you got to the mall you waited until you saw fingers move your phone down you looked to see Todoroki you smiled "I thought you left me" you said nervously but he shook his head "Let's go get some stuff" you said "I brought my fathers credit card" Todoroki said "Really?" You asked and he nodded "But I'm paying" you said "I am" he said you guys had a little argument over who is paying so todoroki won because you gave up "But don't you have to pay him back?" You asked "No" he said

'This is going to be great'