(This is going to be platonic since I'm making this a Platonic yandere Aizawa x student reader.)
It just, didn't feel, right. Without him. It wasn't right not having him as a teacher. Why, why did he have to die? You hated every villain, they caused this, they made this happen. You had more burning hatred for villains than any other soul did.
What did Mr. Aizawa ever do to deserve this?! He was only doing his job and nothing other than trying to save innocent people who were probably going to die at the villain's hands. But no your teacher did instead. Disintegrated into nothing by that damn villain Shigaraki. That villain had already injured Mr. Aizawa enough hadn't he? While not, he probably never would have enough. Because he's a villain, and that's what they do.
You clenched your fists until your knuckles were white, still in grief and depression. Warm tears threaten to fall down your face. 'Why?' Was all that flooded your thoughts, 'why?'
You sobbed into your knees that were currently hugged into your chest, your arms tightly wrapped around them. You then suddenly felt a cold touch, as if someone touched your face. Your head slowly rose. "Huh?" You said, still in the middle of crying. You shivered, feeling the icy touch again. But on your back this time, as if someone was putting a hand on your back to comfort you.
You looked around to see nothing but your room and its objects. You then heard a faded voice,
"Hey, it's me."
The voice sounded oddly familiar. "W-who's there?" You stuttered.
"It's me (y/n)." The voice spoke once again.
Now that you listened, it sounded like, Mr. Aizawa's?! But how? Ghosts don't exist! Or that's what you thought anyway. "Is it who I think it is?" You spoke into the empty room. If someone were to walk in on what was going on, you were to look like a crazy person. "Yes it's me (y/n), now believe it girl." The ghost spoke, sounding like classic Aizawa. "But how?" You asked confused, the tears you previously cried now drying on your face."It's just how it works I guess." He replied boredly. "Can you show yourself at least?" Your mood improving. "Ugh, fine"
Suddenly Mr. Aizawa appeared. Looking like his normal, usual self. You look in awe, smiling, wiping a tear away from your eye.
You then try your best to hug him, but it doesn't work that well. Because he's a ghost, but without you knowing he smiles. He then returns the hug, trying his best.
He would now protect you, no matter what it took. You were like family to him, he wasn't going to let anything happen to you. And if anyone were to do anything, he would haunt them until they went insane.
He needed to protect you.
