You didn't know what happened but just as the battle with Baron Draxum was ending, just as you and the turtles were going home, something bit you on the arm and then another on the back of your neck. You went to swat the thing on your neck but when you moved the arm that had the same bite, the green glow had made you realize what they are but when you were about to swat them off, Mikey must have noticed and tried to help. Unfortunately, it was too late.

You let out a pained groan, collapsing to the ground. It felt like your blood was on fire as the ooze quickly moved its way through your bloodstream. The ooze set to work and mutated your body but it felt like it was a slow process. Your senses weren't working properly anymore. You could tell Mikey was freaking out and getting his brothers' attention. Everything you hear was muffled, the pressure of touch felt numb and burned at the same time making you flinch away, your eyesight started to blur to only a bunch of colors, your sense of smell felt like it was gone but you somehow could smell the panic coming from the brothers.

"Since they are so attached to you all, I did the courtesy to make sure they stay with you." Baron Draxum spoke with the most arrogant and sinister smile as he looked down upon your curled up form.

"You bastard!" Raph yelled out, his hands already clenching his tonfas tightly.

"(Y/N)!" Mikey shouted for you, tears already streaming down his face as he watches you whimper in pain, the transformation already starting.

"Oh, you're so gonna regret this," Leo said through gritted teeth, his sword held tightly between his hands. His eyes cold and calculating as he and his oldest brother prepare to attack the yōkai.

Donnie didn't say anything but stand there with his bo staff held limply between his fingers. For the first time in a long time, he didn't know what to do, didn't know what to think. He sees his youngest brother kneel in front of you, his hands hovering near your figure but he was lost and panicked to know what to do. He sees his brother's eyes fill up with tears, repeating your name multiple times. The soft shell turtle was supposed to be there, to comfort you right now. But he just felt stuck, frozen in place.

"Donnie, do something!" Mikey begged, tears now streaming down his face as he turns to look at his brother. It must have snapped him out of it because he dropped his staff and joined him on the floor. He went to touch you but you only flinch away but it seemed to start the sobs that you somehow contained.

"I-I can't do anything right now, it's only hurting them." The turtle in his signature purple mask said, distress clear in his voice. Mikey and the other turtles knew how much he liked you and seeing you in so much pain must be hurting him more than them.

"Make it stop!" You sobbed out, your fingers fusing together as you went to press your hands to the side of your head. The pigment of your skin changed into the same smooth green skin the turtles had. Your hair disappeared and your facial features changed. Orange-yellow spots trickled around your face and shoulders like freckles. You let out an ear-splitting scream when the ooze formed a shell around your body with star patterned marking on it.

The two brothers fighting Baron Draxum winced at the scream that the yōkai took advantage of by swatting them away to make his exit. Raph and Leo tried to go after him but he was long gone when they got up. Panting they looked at one another with worried looks and jogged to where they left their other two brothers with you.

"Is (Y/N) okay? What happened? What do they look like?" Raph was interrupted by Donnie who gave his oldest brother a glare as he and Mikey block Raph and Leo's view of you. It wasn't intentional, the two just walked behind the other two.

"We can play 20 questions later. We should-" Donnie stopped when he heard you shuffle to sit up. Turning back around with now all the brothers looking at you, their eyes widened. You were currently examining at yourself but you were a box turtle. Supposedly the same species as Mikey but there were a few differences.

"Of course, (Y/N) last touched Mikey when they were stung so they're a box turtle," Donnie said still watching you with wide eyes but there seemed to be a soft look in there too from when the brothers looked at him. The look turned to panic again when you started to hyperventilate, tears starting to form once again as you muttered 'no'. He reacted quickly and moved to place his hands on your shoulder, hoping to ground you.

Looking up, you stared at Donnie's soft and sympathetic look. Your bottom lip trembled and you started crying again, breathing becoming harder for you as you look down with a hand on your mouth. He quietly said 'hey, hey, hey', making sure you that you look at him with a finger tipping your chin up.

"Keep looking at me and breath with me. In." You copied him, your hands clutched now between his. "Out." You let your breath out after ten seconds but you still gulped for breath with hiccups not helping. He repeated the process again and you followed, staring into his eyes, your focus. You didn't notice but the others walked away to give you both privacy and had gone to the Turtle Tank.

A few minutes later, you were able to calm down. You looked down, just watching his thumbs rub circles around your now limp hands. The sensation was nice and would usually make you giddy but you just couldn't do it right now. You felt numb at the moment at about the fact that your hands only had two fingers and one thumb on each and the fact that it was green. You understood you were a turtle from what Donnie said earlier but now you were tired and just want to go home. You paused your train of thought.

"My life as a human is over. I can't go to school anymore. I can't finish high school, go to college, get a job, or go home. Oh god, I can't believe I'm already missing school."

"Hey, it's ok. You can still do them it's just going to be different. We-I'll make sure everything will be fine. I promise." Donnie replied, his voice quiet as if afraid to disturb the peace.

"Everything isn't fine, Don! Look at me, my parents are going to freak out a-and I won't be able to go home because of it. I can't walk in daylight without people staring or-"

"How do you think me and my brothers feel, hm?" You shut up after that, looking away guiltily while Donnie gave you a hard stare. "We get it. I get it. But being different even this drastically shouldn't stop you. I know everything feels like shit right now and it feels like all the opportunities you have as a human is gone, I get it. I understand what it's like to not be able to go to college, get degrees, or have a career, I get that. And yet my brothers and I still make the most of what we have. Sure some days wear us down and yet we still learn to be happy and we will make sure you are happy too, you don't have to do this alone."

"I'm sorry." You whispered, wiping a tear away. He let out a sigh and wrapped his arms around you making you tense up in surprise. It's rare for him to initiate some forms of affection with anyone.

"It's fine. Just, don't make this feel like it's the end of the world. I'll be with you all the way." He said while he placed his chin on your shoulder while you placed your head on his plastron.

"Promise?"

"I promise."