Transformation Quirk

UA and Quirks

After they finished eating, Mic got up and went back to their bedroom to get dressed (he's in his pj), while Aizawa washed up.
Izuku just sat on the couch with cat in his lap.
Mic came back 10 minutes later dressed and with everything he needed for the day as a teacher, he walked over to izuku and said ,,hey lil listener, we need to go. Can you put on your shoes?"
Izuku just nodded and did what he was told, while Mic went to his boyfriend to say goodbye.
,,See you later, babe! Love you!"
,,love you too 'zashi.."
They kissed and as they pulled away, they saw a fluff of green hair in front of them.
,,I'm finished.." he mumbled quietly.
,,great, then let's go!" said Mic and picked him up. He settled Izuku on his hip and walked out of the door. Izuku holded tight on him and cuddled closer.
Mic smiled at the occupation and made his way to UA.

TimeSkip
When the both stood in front of the staff room, Izuku suddenly got very nervous.
,,What if they don't like me...?"
,,don't worry little listener they will absolutely adore you."

,,promise?",,promise."

Mic put him down and took his hand before he opened the door.
Everyone turned around and starred at the little boy.
,,h-hello.."
It was quiet before a loud squeal echoed threw the room.

A woman with dark blue hair stepped walked towards him before picking him up.
,,you are the cutest little thing I've ever seen. I'm Kayama Nemuri."

,,m-my name is midoriya izuku.. but call me izuku.."

Mic smiled slightly, he was glad that izuku was opening up a bit.
Ectoplasm stood up and also started walking towards him.
,,hello little guy, I'm ectoplasm. Nice to meet you."

Izuku waved at him and smiled a bit.
,,y-you look cool, w-what's your quirk?"
,,I can multiple myself." he answered.
,,can you use it? I want to see it.."
,,of course" he said and multiplied himself for a short moment before going back to normal.

,,Miss Kayama can you put me down? I want to try something.."

She nodded and put him down.
All eyes were on him as he stood there. Suddenly he began to cramp.
The teachers started to worry while Mic freaked out.

But it disappeared as he began to shift and a second Ectoplasm stood there.

,,is it just me or is there me...??" was everything the real Ectoplasm could say.

Izuku as fake Ectoplasm also multiple himself before he shifted back to himself.

,,wow.." was the only word they could manage to say.

,,is this his Quirk, Yamada?" Kayama asked in amazement.
,,I guess it is.."

                                                                     
Word count: 461
Okay I don't know if I mentioned it but Izuku needs to have seen the Quirk while the person uses it to 'copy' it. Even if he didn't see it, he could still change into the person's appearance.
Like Mina, he can change into her with all the pink and horns even if he didn't see the acid. After he saw the use of it he can use it in her appearance.
Does it make sense?