Musutafu Mall, Japan
14 Years Prior
It's December 24th, 20XX. (We don't know the exact time and age of MHA. It's debated to be somewhere between the 21st and 23rd Century)
Christmas Eve in Japan. Toshinori and Inko are in the mall with a little green-headed baby in a stroller, dressed in an All Might onesie. They were in line to see the man himself. Clad in red and white clothing, a black belt and boots, white beard, red cheeks, and magic. Saint Nicolas, who many know him as Santa Claus (サンタクロース). The two Yagi adults thought it'd be good to introduce little Izuku to the idea of Santa at a young age. It'd encourage him even if he didn't understand most of the time. To be good.
Inko had a very excited look on her face while she held her camera, "Ooh this is gonna be good! Izuku's first Christmas." Toshinori smiled looking down at his wife, "Definitely. I think we both know what he's gonna ask Santa for though." She just chuckled at her husband's response. Soon, Izuku and his parents were at the front of the line. Izuku smiled with his pacifier in his mouth up at the jolly, mythical figure. Toshinori notices and unbuckles Izuku from the stroller, putting the little boy in Santa's lap while taking the pacifier away. The large man chuckles with his normal, "Ho, Ho, Ho. What's your name, small one?"
Izuku just babbled out, "I-Izwuku!" Santa just smiled, "Well, Izu. Have you been a good boy this year?" Izuku bounced in his lap, nodding and giggling. Inko 'awhed' and took pictures as Santa continued his questioning. "So, would you like to tell me what you'd like this Christmas?" Izuku is quiet as he has a concentrated look on his face. Santa looked confused and Toshinori whispered, "Give him a moment." Finally, Izuku responds with, "T-Toy!" Santa smiled, "Well what kind of toy, Izu?" Izuku cheered out, "A-Awll Mights!" Santa laughed, "Ah! Well All Might is a good friend of Santa Claus. Maybe I could get you that All Might toy, especially if you keep being good." Izuku seemed happy with this and after some more pictures. Toshinori and Inko left with him.
Toshinori carried the stroller while Inko held Izuku, giving him his pacifier. "Now, Izuku. That man was Santa Claus, if you're a good boy every year..then Santa will come on each Christmas and give you presents!" The baby squealed and smiled, then Inko returned him to his car seat as they got to the car. Toshinori putting the foldable stroller into the trunk of the car. They soon drove home where the Bakugo family was waiting. They parked the car and got out, Mitsuki smiled at her long-time friend. "Hey, Inko!" "Hi, Mitsuki!" The two greeted each other with wide smiles. In their arms were the 1-year-old Izuku and 1 and a half-year-old, Katsuki.
Katsuki squealed out at his best friend, "I-Izwu!" The younger boy nearly dropped his All Might pacifier at the sight of Katsuki, "Ka-Katsu!" Inko and Mitsuki were immediately surprised by the two boys' squealing and hurried inside to the living room, a Christmas Tree in the corner. They sat the two babies down in Izuku's room so they could play while the adults conversed. Katsuki and Izuku played with stuffed animals and drew a little on pieces of paper with crayons. Then, Katsuki got an idea. A rather...naughty one.
Katsuki began to crawl out of the room through the cracked door and Izuku, being a curious little boy, followed. The two managed to sneak out the house through the backyard door in their onesies. Was it cold? Sure, but they are two, excited and curious babies. They do not care. They got outside and Katsuki attempted to walk, he wasn't very good at it. He stumbled up to his feet and waddled out. Izuku followed, but even worse at walking he immediately fell into the snow with an "Oof!" He shivered a little, but Katsuki helped him back up. Then the two sat on the snowy ground. Making little constructions with the snow like they would at the beach.
Soon, the adults realized the two boys were gone and dragged them back inside much to their dismay.
Meanwhile...
All For One's Residence
6 Year old, Tomura is having his first Christmas since All For One took him in. In their hideout, Kurogiri is playing Hide and Seek with the young boy. Tomura hid in a closet of his Master's bedroom whilst Kurogiri looked for him. "Tomura Shigaraki...where could you be?" The boy stayed quiet, not wanting to be found. Then suddenly it was quiet...Tomura opened the closet door to peak out for a new hiding spot. Then he was grabbed from the side by Kurogiri who yelled out, "I've gotcha!" Tomura squealed/screamed in fear, not expecting the sudden grab. "AHH!"
Kurogiri chuckled and then noticed the tears going down the blue-headed boy's cheeks. He then had a solemn look, upset that he had made the boy cry. He hugged the boy and Tomura hugged back with his gloved hands, the gloves to prevent him from dusting away stuff. "I-I'm so sorry, Tomura. I didn't mean to scare you.." Tomura just nodded, "I-I forgives..." Kurogiri picked him up, smiling a little. Tomura noticed a light coming from the living room where All For One was. "Wats dat?" He pointed to the light and Kurogiri smiled. "Master must've finished decorating the tree!"
Tomura seemed confused as Kurogiri carried him to the living room, the bright tree shining and the little boy's eyes lit up in amazement. AFO turned to look at Kurogiri and Tomura with his gray eyes, smiling. His white hair was bright as ever. "Ah, Tomura and Kurogiri. How nice of you to join me. I've finished the tree." Kurogiri sets Tomura down and the boy walks up to All For One. "W-Wats the twee for?" The white-haired villain got down on the boy's level. "Well, Tomura. If kids behave well, a man named Santa Claus comes to their home and brings them presents! He'll put the presents under the tree for you to find in the morning, but if you try to see Santa. He won't come."
Tomura nodded and AFO got back up, "Now. Let's go eat. I'm sure that dinner is done now." The blue-haired child took his hand and walked to the kitchen with him and Kurogiri.
Next Morning
Christmas Day
Izuku and Katsuki were awoken by their parents, smiling wide. Inko cheered while picking the green-haired baby up. "Izuu! It's Christmas!" Katsuki and him squealed, excited. Once set down, the two little boys (Attempted to) ran to the living room, where there were a bunch of wrapped presents.
At the same time, Tomura was awoken in his bedroom by Kurogiri. "Hey, Tomura Shigaraki. It's time to wake up." The boy opened his eyes slowly, "H-Huh?" "It's morning time, buddy. Christmas." At the word, 'Christmas', Tomura's eyes snapped open as he immediately bolted out of bed and past Kurogiri to the living room where All For One was, at the couch with a black cup of coffee. "Hi there, munchkin. I see you're awake. How about you look under the tree?" Tomura looked at it and gasped in amazement. Many red and green wrapped presents under the tree, Tomura's mind had exploded.
Katsuki and Izuku in the Yagi Household ran up to the presents and looked back to their parents for a sign of approval to begin ripping them open. The mothers nodded with smiles and the two boys immediately began tearing the presents open. Izuku squealed as he ripped open a present and revealed exactly what he had asked Santa for. A plushie All Might toy, "Uwa!" Katsuki opened his and smiled wide, getting an All Might blanket. "Yay!"
In the Villain Hideout, All For One smiled, "Go ahead. Open them." Tomura opened some of his presents, smiling. A rare thing to see from the boy. Inside he found many toys, like plushie knives, toy guns, the perfect things for a young villain. But in the last present, this one took some convincing from Kurogiri. Tomura hadn't known his biological family all that much, especially his Grandmother. The 7th Holder of One For All. Nana Shimura.
Tomura opened the final gift, to find a costume. Perfectly fitting for him. He turned around to look at his Master, "Wats dis?" The white-haired man sighed, "That, Tomura...is the hero costume of your grandmother. She passed a long time ago, but I thought you might like that." Tomura smiled a little, "Gwandma was a hewo?" "Yep. We were...good friends." The boy smiled and put on the costume, smiling.
In the Yagi Household, the two boys played for a bit with their new toys. Running and crawling around while the adults exchanged their own gifts. Soon, the two little boys fell asleep in Izuku's room. Drawing pictures of All Might.
It was a great Christmas for both the Symbol of Peace and the Symbol of Evil.
(A/N: This was about 500-700 words shorter than my average chapter. But Christmas doesn't give a lot of writing time. I hope you enjoyed these three boys' Christmas Day. Have a Merry Christmas and a Happy New Decade!)