Before the sports festival

When the students got back to class Mr. Aizawa comes back to class and the students are obviously surprised. He assures them that he is fine and the recovery girl just went a little overboard. While he was talking a woman walked in and everyone immediately recognized the number 5th hero.

In Izuku's mind-

"That's the colorful hero: color wheel! I wonder what she's doing here."

Aizawa speaks up when he sees the class go quiet

"Class, I'm sure you all know who this is."

"Hey, guys! I'm the hero color wheel but at school, you can call me Mrs. Misaki. I'm the counselor. I haven't been here because I still fully run my agency. If you need to talk to me you can schedule a meeting or find me in the halls! Of course, I can talk to you about anything. Friends, family, real-"

"Karu, you came here for a reason, remember?"

Mr. Aizawa scolded while Mrs. Misaki looked apologetic.

"You're right Shouta, I'm sorry I got a little off-topic. As of today, a new student will be joining your class. You all might recognize her but please do not ask questions until we fully explain the situations. You can come in now Kat."

Color wheel signals and the girl from the USJ incident walks in. Everyone is surprised and some look angry and others look scared. Kat has dark skin and her hair is neatly packed into a fro. Her left eye was a very deep shade of blue while her right eye was covered with a black eyepatch. She walks up next to Mrs. Misaki and drops her bag. She gets on the ground to bow in front of the entire class.

"Kat... I told you you didn't have to do this."

"I'm sorry Mrs. Misaki,but I feel like I have to. I would like to deeply apologize to everyone in the class. I am so sorry if I hurt any of you in any way. I know it is hard to trust me but I want you all to know I will work extra hard to win back your trust."

Everyone in the class is a little shocked. Mrs. Misaki speaks up.

"Kat why don't you tell everyone what happened. I'm sure they'd understand."

"Ok."

She slowly gets up and faces the class but still bows her head.

"My name is Katana Hiromi but you all can call me Kat. I was a student at UA. I got in by recommendations and a scholarship. On my way to the first day of school, I was knocked out by someone. When I woke up I could barely move and I didn't know what was going on. I noticed someone was going to get hurt so I jumped in front of him and then blacked out again. Again, I am deeply sorry for my actions."

Izuku remembers the girl and speaks up.

"It's true. She jumped in front of me and the villain when he was about to disintegrate me. Thank you for that."

Kat looks up and recognizes him.

"I remember you. Are you ok?"

"Yea I am."

"That's great!"

Kat gives a little smile and makes Midoriya blush.

"I'm glad you already have a friend Kat. Please take your seat"

"I guess that means I'll be taking my leave. Bye, everyone."

"Like you, all may know every year UA hosts the sports festival. You all will be competing against each other and other classes in the school."

As Mr. Aizawa goes on, everyone in the class gets excited. Including Kat. At the end of class while everyone is talking to each other and mingling Kat is still in her seat looking out the window. But nobody seems to notice her. It's like she faded into the background. The day after the festival is announced after class the door is blocked by a bunch of students from other classes. As everyone in class 1a is trapped inside the class. It becomes obvious that the students were checking out their competition. As Bakugo makes his leave Kat, who was still in her seat, makes her way to the door right after Bakugo. A boy stands in front of her.

"Aren't you a pretty little thing? Isn't the hero course too dangerous for someone as cute as you?"

Kat's expression is unreadable for a second. Then she gives a bright smile and says in a sweet voice-

"If you still want to keep your ability to walk you will get out of my way."

Scared the boy gets out the way and Kat passes through. No one can read her expression but it's obvious that she's hiding something. Maybe being mysterious is apart of her strategy or maybe there is something interesting behind the eyepatch she always wears.