Yoroi is an old soul.

He's been around for centuries. He remembers times where people didn't have cellphones, he remembers the Taisho period, he remembers clans and empires.

He also remember when quirks didn't exist. His mistress, her mentor, and many, many others. He's seen death and he've grieved. In his many years he has met many, many children, and Midoriya Izuku-kun is quite the special boy.

He is different, many lost their kindness and innocence to life and suffering. Instead of losing his empathy, it only grew. Izuku-kun is kind and loving, gifted with sight but no quirk. He remembers him of mistress when she was young, still smiling, still kind, before life killed it from the world.

And Yoroi couldn't help but feel protective.

The world is curel. He know so, and he is scared that it will one day kill the kindness in Izuku, like it has killed them in many. So Yoroi stays with Izuku. He stays with him, and protects him like he did with so many others. And unlike last time, he will succeed.

(He failed. He was supposed to protect her but he failed, what kind of servant is he, if he just let his mistress die?)

He already failed once, he can't fail again.

He remember the moment he realized who Izuku really is. The very exact moment he realized, he felt the world around him come crashing down as he thought:

'Fate, you are cruel. Very, very cruel.'

He thought as he looks into those emerald green eyes, glistening with happiness and innocence, wide and round with that accompanying smile.

It couldn't be anyone else. Izuku's image overlaps with the girl from three centuries ago, the same smile, the same eyes, the same determined gleam. It couldn't be anyone else.

He even have her freckles, dammit. He looks away, the girl with black hair, the same bright green eyes and smile and freckles freash on his mind. His mistress adored her, loved her, she loved her so much, not asking for anything in return. Unconditional, without reason and so touching. He remember finding Mistress' body, laying limp in the snow in front of the tree. Bloody, limp and silent, with no signs of her ghost. He remember what happened to her as well, when she found out, and it killed her inside.

He could only hope fate won't be as cruel to him as it was to her.

Ever since he found out, he became hyper-aware of Izuku's every move. He noticed that Izuku walks the same way she did, and that his loopy hand writing resembled hers. He noticed that the way he mutters when he thinks is the same, and remembers how mistress used to flick her forehead lightly when she does it.

But his mistress isn't here. His mistress is gone.

She's gone. So Yoroi will look after her sister's descendent.

For mistress.

Yoroi-san is weird. It might sound rude, but Izuku really thinks so.

For one thing, he knows that Yoroi-san has a human form, and is capable of actually, physically speaking instead of telepathically relaying everything to him and his mother. But the golden fox flat out refused to speak, and only told him things telepathically.

Well, at least untill middle school.

It happened suddenly. One day he is silent and the other he's staring at him like he just discovered something utterly unbelievable, and spoke to him.

"You're..." He pauses and shakes his head, "Nevermind, Izuku. Let's... let's head to school."

He'd stared at him for hours after that. Kacchan called him out for being weird, but Izuku was to busy thinking to notice. Why did he suddenly speak? After spending over a hundred years in silence, too— well, at least according to Yoroi-san. But Yoroi-san is a honest and earnest person- Kitsune- and he had never lied to him. He would tell him that he he is hiding things and when there are things he can't answer, he'd tell him, but Yoroi never lied.

Yoroi-san is also protective, and he only became more so after middle school. He used to be annoyed at Kacchan, but after he began talking to him, he down right smacked a tree in Kacchan's face. Izuku was horrified at that, but relaxed after Yoroi told him he wasn't about to injure a boy, and had controlled the strength of the blow.

"He is abusing you," He also said, "And if no one tells him what he's doing is wrong, he's going to grow up terrible... he won't become a hero." He reasons.

"But Kacchan's amazing!" Izuku protests, "He's always so strong, so-"

"Izuku, would a hero grab your arm and use his quirk to hurt you?" Yoroi-san asks quietly, "Would a hero call you useless?"

Izuku was silent.

"B-but..." He whispers, "I am quirkless."

Yoroi-san circles him with his fluffy body and whispers. "It doesn't matter, child, because you are so much more."

He cried, and the fox conformed him. That was also the first time he saw Yoroi-san in his human form. Dressed in a white kimono, an amber hakama and a red haori draped over, all decorated with golden patterns. He has long, wild, unruly black hair pulled back into a ponytail. He looks young, in his early twenties maybe, with bright golden eyes.

He sees him more often afterwards. He would shift into his human form to hang out with him, turn visible and accompany him to the mall. At first he wanted to head there in his kimono, but his mother dragged him into the room and forced him into some more appropriate clothes. It was funny how awkward Yoroi-san in, in his father's old clothes. A few times people mistook him as his elder brother and Izuku'd stutter, stammer and stumble over his words, but Yoroi-san? Well he'd smile and say that he wish it was true. And Izuku'd get flustered over it all over again.

Yoroi-san is also incredibly clueless with electronics. He calls his smart phone 'the glowing informative device', and the TV 'the noisy metal box'. How he'd spent 300 years in the modern world and not learn to call them by their proper name, Izuku has absolutely no clue.

There's also once when Izuku ran into a violent Yūrei which resembles Sadako. It's clawed out of the TV, reached for him with bloody claws, and Izuku screamed. Yoroi-san came barging in, growling at the girl with bared teeth, and with a stomp, forced her away with glowing runes.

When Izuku asked what those glowing runes are, he answered softly.

"Blood runes." He said with a smile, "I was only capable of Elemental magic, but my mistress..." His eyes gained a far away look, "She left me with some."

"Your mistress? Who?"

His smile fades into a sad look.

"A good person." He says, "A very good person who saved me."

Yoroi-san talks about his mistress a lot. He'd mention her every now and then, almost like Izuku with All Might. He'd make a small comment about how pretty the sakuras are, then say they resembled his mistress. Sometimes Izuku would try to teach him how to use a phone properly, and he'd say his mistress already tried.

Izuku never pushed or asked him about this 'mistress', though. And Yoroi-san didn't tell him much. All he knew is that she's dead.

Yoroi-san appearantly, can eat. And ever since mum found out, she'd always insisted for him to join them at dinner. Yoroi-san gradually began hanging out with him in his corporeal, human form more often, sometimes walking him to school, and often walking him home. He's heard some of the girls at school talking about him, and nearly choked on his lunch when he heard some of them wonder whether Yoroi-san has a girlfriend.

Yoroi-san is also kind. He isn't perfect, but most of the time he tires to help.

And Izuku couldn't be any more greatful for him.