"Yukio! We need you to open the door!" Tsukauchi tried to reason with the vigilante.

"Give me one good reason I should open that door!" Yukio shouts back.

"Besides the fact that you're an illegal immigrant under police custody for murder, vigilantism, falsified legal documents, multiple cases of assault, and possible stalking charges?" Tsukauchi asks sarcastically. "We have questions we need you to answer, and personally, I rather do it face to face."

"That makes me want to open that even less than before!" Yukio laughs. "You need to work on your bedside manner."

"I'm sure you would rather have your own clothes." Aizawa says. "I'll give them to you if you open the door, come out here and talk to us."

The door slams open, and Yukio emerges, holding his hand out. "I'll change first, then answer some of your questions."

Aizawa only handed his socks, underwear, t-shirt, and pants to him after Tsukauchi nodded. They would hold on to his armor and boots until they could trust that he wouldn't run. Yukio changes clothes and then returns to bed, letting Dr. Shinsou reattach his IV and heart monitor. Aizawa noticed how Yukio refused to look the doctor in the face.

"First question," the doctor starts before Tsukauchi could interrogate the vigilante. "Are you in any pain? You took a bit of a fall there and ripped out your IV."

"Not the worse pain I've been in." Yukio shrugs. The others grimace.

"Next question." Dr. Shinsou crosses his arms. "How do you know my son?"

"I do not know your five-year-old son." Yukio doesn't look at him, "but you remind me of my husband, and I always called him Toshi."

"Both statements are accurate." Tsukauchi mutters, "But something… you're keeping something from us."

"I'm keeping a lot of things from you." The vigilante shrugs. "But I'm entitled to some secrets."

"You've mentioned your family a few times since we met." Aizawa says. "If you're willing to cooperate, we can help you save them."

"Bullshit." Yukio snaps. "The portal is gone, and there's no guarantee I could point our island out to you on a map. We were completely cut off from the rest of the world."

"Enough." Hizashi's tone was firm. "You said Dr. Shinsou looks like your husband, and Shouta said you had kids. Why don't you tell us about them while the doctor gets you hooked back up? There's no need to interrogate him now when he's going to be here for a few weeks."

Yukio reaches over the bed and pulls his utility belt out of Hizashi's bag. Opening one of the pouches, he pulls out a metal case. Inside were a couple of pictures; he stared at them before handing them to Aizawa.

The first picture was of Iridescent in full vigilante gear, standing next to a blonde man with spiky hair who was scowling at the camera. He was wearing the same military-style vest without the undershirt, belt, pants with built-in metal kneepads, and boots as Iridescent, which made Aizawa wonder if it was actually Yukio's vigilante costume or a military uniform for his country. The blondes were done in bright orange, whereas Yukio's uniform was done with green trim. He had an orange visor with orange and black earpieces that looked like fans, black compression arm sleeves, and green gloves. His belt held grenades, and he had an orange holster over the vest that made an X. He was holding what looked like a giant grenade and sticking his other arm inside it. Yukio was looking at him with a massive smile on his face.

"Who is he?" Aizawa asks, handing the picture over. They ignored Tsukauchi when the detective took a photo of it on his phone.

"My older brother." Yukio wiped his eyes with his sleeve. "We were childhood friends, only four months apart. His family took me in when my mom died."

The following few photos were of Yukio and his brother with other people. Yukio explained they were his friends and teammates, people he had grown close to while they were in training, and both men considered them family. There were a few that had been circled red. When Hizashi asked why they were circled, Yukio pulled out a red marker and circled himself in each picture. Aizawa remembered Yukio had said that his family had probably held a funeral for him long ago. The look on the faces of the others said they also understood what the red circles meant. There were a lot of red circles in those photos.

The last two seemed more meaningful, and Yukio was reluctant to pass them over. Aizawa took care as he was handed each photo. One was of a man with purple hair in a small ponytail and facile hair, standing behind Yukio with his arm wrapped around his chest. He wore the same uniform as Yukio and his brother, with purple accents. Unlike the other two who had visors, this man had a mouth guard loose around his neck. A voice quirk? Toshi really did resemble Dr. Shinsou, even down to the eye bags.

The other was of Yukio, with a little girl asleep and curled up in his lap, with a boy sitting across from him, making a sphere of water from his hands. She had long silvery hair and a horn; the boy had black hair and a backward baseball cap with horns. They were also in the same uniform, the girl in red trim and the boy in blue.

"My daughter and one of her friends that we took in." Yukio held the picture as if it would turn to dust. "I found her on a mission four years ago; some bastard was experimenting drugs on her. Toshi's dads were going to take her in, but then they were attacked. One died and the other was severely wounded. We took her in since she was comfortable with us. She's turning eleven this year. I'm going to miss it."

Yukio curled around the photos they had given back to him and sobbed. Aizawa grabbed Tsukauchi and dragged him from the room, Hizashi and Dr. Shinsou following them. They could still hear Yukio crying inside as they huddled around the door. Aizawa rounded on the detective. "You can't interrogate him like this."

"No." Tsukauchi agreed. "My boss won't like it, but there's no way we'll get a straightforward answer from him. We will need to talk to him again, but for now I'll leave him to rest. In the meantime, we need to check out the only other lead we have on him."

"Midoriya Inko." Aizawa nods. "Her son should still be in school, but we still don't know her work hours."

"I'll get her number from the file." Tsukauchi pulls out his phone and makes a call.

…..

Aizawa and Tsukauchi pulled up to the apartment building where Midoriya Inko and her son lived. Double checking the correct unit number address, they make their way to the second building and climb the stairs to the third floor.

"Let's hope she's home," Aizawa says as he knocks on the door. They hear a voice inside called out to them and movement coming towards the door.

Midoriya Inko was shorter than Aizawa imagined. She opened the door with a smile, wiping her hands on her apron. "Hello, how can I help you?"

"Are you Mrs. Midoriya?"

"Yes?"

"We have some questions regarding you and your son. May we come in?"

Mrs. Midoriya's face seemed to go blank. She took a deep breath and smiled, though it didn't reach her eyes. "Of course. Come in."

She steps back and holds the door open for them. She opens the closet next to the front door. "Let me grab the guest slippers."

As they enter and close the door behind them, Inko turns around with a pistol trained on Aizawa. Both men froze, Tsukauchi's hand going to his own gun.

Inko releases the safety. "Don't do that. Now, you're going to tell me who you are, who you work for, and what you want with my child."

"Mrs. Midoriya, you need to put the gun down." Aizawa holds out his hand.

"Not until you tell me what you want with my son!" Inko snaps. "You can tell Hisashi to kiss my ass if he thinks he can hire some asshole to come and take my baby away. Izuku is not broken! I'm not letting anyone run fucking tests on him because he's Quirkless. He's my baby, and he's perfect, and no one will try to take him from me again!"

"Mrs. Midoriya, I don't know who Hisashi is or what he's after, but we're not here about Izuku. We needed to ask you about someone else by the name of Yukio." Tsukauchi moves closer, his badge in his hand. "I'm a detective in Musutafu. This is Pro Hero Eraserhead. We don't mean any harm, we just want to ask you some questions. Can you please lower the gun?"

Inko holds out her hand, and Tsukauchi hands over his badge. Aizawa pulls out his hero license and gives it to her too. She steps back, the gun still trained on them, as she looks them over. They breathe a sigh of relief when she switches the safety on and lowers the gun. Inko hands back their IDs, her eyes filled with tears.

"I'm sorry." She sobs. Aizawa reaches forward and pulls the gun from her hands. She wraps her arms around herself as he goes to empty the chamber, only to find nothing in it. There wasn't even a clip in it; she had bluffed them with an empty gun.

"It's good." He tells Tsukauchi. Inko holds out the safety device and the key to the lockbox, and Aizawa puts it on the gun, storing it in the open safe in the closet. Tsukauchi helps her into the living room to calm her down, and Aizawa joins them.

"I'm so sorry." Inko was saying. "I shouldn't have pulled the gun on you gentlemen, but I've already had someone follow us home trying to get me to give them Izuku and I don't know who's working for my husband and I can't lose my baby. I'm sorry, please forgive me."

"Ma'am are you and your son safe?" Tsukauchi was frowning. "Have you gone to the police, taken out a restraining order?"

"It hasn't been that bad." Inko was popping her knuckles subconsciously while she spoke. "It's just been this last week that he's been more persistent. He wants to take Izuku to this specialist; he said he could cure his Quirklessness. My baby doesn't need to be cured. It's not a disease."

"We understand, Mrs. Midoriya." Aizawa says, sitting in the chair opposite of them. "Though if it doesn't stop, for Izuku's safety, you may want to think about a restraining order."

"Thank you." Inko clears her throat and wipes her eyes. "Now, you said you had questions. Something about someone named Yukio?"

Tsukauchi pulls the photo out of the file and hands it to Inko, whose eyes widen in surprise. "His name is Takeko Yukio. He was recently arrested for vigilantism and hospitalized. Do you recognize him?"

"Not him personally." Inko shakes her head. "But he looks really similar to my father and Hisashi, my husband, when they were teenagers. Why do you ask?"

"He has no paperwork." Aizawa says. "No medical records, no birth certificate, nothing. We did some blood work while we had him in custody and your son came back as his closest biological relative. According to the test, they're half-brothers, with you as his mother."

Inko was already shaking her head. "Izuku is my only child, I've never even been pregnant before him. How can I possibly have another child? How old is he?"

"He's between nineteen and twenty, which is why we have to ask. You would have had to be eleven when you had him. But based on what we know of his history, we believe it's something else. Did you even give blood as a child to a blood drive, a clinic, or a hospital?" Tsukauchi asks.

"What?" Inko looked bewildered. "You think someone stole my blood and did human experiments to make children?"

"It's a lead we're following because of the physical state we found him in. These are pretty graphic, and you don't have to look at them." Aizawa hands her a few more pictures. They were taken of Yukio's wounds.

"I was a nurse before I had Izuku." She takes the photos, flipping through them professionally. "This man was tortured, wasn't he?"

"We believe so." Tsukauchi answers. "He's not from Japan but an Island nation that was going through a civil war. He was a soldier that was displaced here, in Musutafu, during a battle. He's been in Japan for a little over a year now, and this is the first time we've gotten close enough to learn anything about him. He's surprisingly talkative for being a wanted criminal."

"We think," Aizawa cuts in. "The island may be a front and everyone there was taken from their homes or even created in labs strictly to run this experiment. There may be more people that had their DNA stolen that may have family members on the island. We want to ask to take a sample from you, and Izuku if you're willing, to test directly against Yukio's to see if it matches."

"I'll do it, but I'm not comfortable with Izuku meeting this man until I have. I won't put my baby in an unsafe situation if I can help it. When can we go?" Inko asks.

"We can go now, if you have the time?" Aizawa gathers the photos.

"I'll grab my purse." Inko goes to her room to grab her purse and keys and meets the two men by the front door. They trade the house shoes for their outdoor shoes and leave. Inko locks the door behind her and follows the men to their car. While on their way back to the hospital, they tell Inko what they can about Yukio without jeopardizing their investigation.

Dr. Shinsou was waiting for them when they got off the elevator. "This might end in a disaster."

"Maybe." Aizawa nods.

"But you're still going to do it, aren't you?"

"Yup."

Dr. Shinsou sighs but motions for them to follow him to another part of the hallway for them to do the blood work. Inko sits patiently while one of the assistants takes two blood vials and gives her a juice pouch afterward. They lead her to Yukio's room.

"If you want to meet him, now might be the best time. They normally sedate him to get blood work done and he's due for it soon." Aizawa says.

"Only for a moment." Inko agrees. "Just in case."

Just in case the test comes back positive. Just in case she did, in fact, have a nineteen-year-old son she never gave birth to.

Aizawa opens the door and leads them in. Yukio was awake in the bed, flipping through a child's book with interest. He looked up as they entered, grinning at Aizawa and Tsukauchi as they came in. Aizawa wasn't sure what reaction he expected Yukio to have at seeing Inko, but it wasn't tears.

Yukio froze. His grin slipped from his face, and he went white, his breathing picking up as his eyes watered. Aizawa frowns, "Are you ok? Do you know this woman?"

Yukio met his eyes. "You bastard."

Tsukauchi tackles Inko out of the room just before the IV stand impales her. He covers her as it hits the wall and goes through it, sending cracks through the concrete. He pulls her up and out of the way of the door as Dr. Shinsou and two male nurses rush into the room to restrain the man. Tsukauchi gets them to their feet and helps Inko to the nurse station.

She was staring at the door to the room where Yukio was screaming, "You bastards! How dare you! She's dead!"

"We need to get you out of here." Tsukauchi says. "I apologize, Mrs. Midoriya, I didn't think he would try to kill you, or threaten you."

"What?" Inko tears her eyes away from Yukio's room. "He's not treating me."

"Ma'am he's shouting that he's going to kill you." The nurse points out. "He threw the IV stand at you."

"I don't think he sees me." Inko says. "I remind him of someone, but he's not seeing me when he looks at me. And whoever that is, he lost them. Seeing me hurts him because of that. Has he been tested for hallucination caused by PTSD?"

"No not yet." The nurse says. "I'll make a note in his chart for Dr. Shinsou."

Tsukauchi hears glass breaking from Yukio's room and runs down the hall. Stopping in the door, he sighs. The window was shattered, and the room was trashed. Aizawa was tangled in his capture weapon, the two nurses were out cold, Dr. Shinsou was on the floor with a broken arm, and Yukio was gone.

He pulls out his radio to alert the other officers in the area. "The vigilante, Iridescent, escaped Musutafu General Hospital at 1:42 pm today. We need a 10 mile perimeter around the building searching for him. He's currently hallucinating and is considered dangerous but not hostile and is to be approached with caution. We want him back unharmed if possible, alive at all cost."

More nurses come into the room, helping Dr. Shinsou and the unconscious nurses to a room to recover. Aizawa untangles himself and sits, scowling, with Mrs. Midoriya to wait for the blood test. The nurse who had taken her blood came in with a file she handed to Detective Tsukauchi.

"Well?" Mrs. Midoriya was popping her knuckles again.

"92 percent match." He gives her a nervous smile, handing her the file. "Congratulations, it's a boy."

"A homicidal teenage vigilante with PTSD." Aizawa sighs. "Just great."

"Well." Inko stares at the papers declaring Yukio to be her son. "Izuku has been asking about siblings since one of his classmates just became an older brother. But I don't think this is what he meant. Now what do we do?"

….

Midoriya collapses on his bed in the shack he built and screams into his pillow. He had not been prepared to see his mother again. He knew it was possible to run into her, being in the same neighborhood as her, but he had not been prepared for the memories to assault him when he was face to face with her.

She was young and thin now. The memory of his short, chubbier mother had replaced her as soon as she entered the room. He could see the blood pooling from her mouth as the older version of her screamed at him to run.

"Go Izuku! Go! I love you baby, but it's too late! Run!"

He screams into his pillow, wailing as his memory of her dying overlapped what happened at the hospital. He leans over his bed to puke on the floor.

'I almost killed her.' He sobs. 'I almost killed my mom.'

Maybe he wasn't ready to go outside as Iridescent yet. He cries until his head feels like it would explode. The pain from his body finally registers, and he sighs, drained of energy. Getting up, he cleans his floors and crawls back into bed, pulling his blanket over his head and pulling out the metal case of photos from his utility belt. He lays there and flips through them, wishing he could see his family again. He cries himself to sleep, curled around a photo of him, his mom, and Kacchan with his parents, and hopes tomorrow will be easier to bare.