(Thank you randomgirlforever666 for the suggestion!)

Leonardo
(I couldn't choose!)

Ever so slowly, you made your away to Leo's closet. Yesterday you were looking for your pen, and you came very close to opening his closet in a dark corner of the room, when Leo stopped you, pulling you away and helping you search. Now you were itching to see what was inside. You checked to see if anyone was watching, then grasped the small door handles and opened it. There you saw, in all its glory, was a Captain Ryan shrine. An action figure was perched on a pedestal, in a heroic pose, with incense holders with half burned sticks on lower pedestals, and a worn blue cloth underneath. You barely made it to the pillow to release your laughter. This was definitely something to use for later.

The laptop was open, as you remembered. A white screen, two tabs opened, shining directly on your face, making you squint. 'Should I?' You wondered, 'should I see what's on the second tab? Leo seemed in quite a rush to change it when I came in..'
Yes, you decided, lowering the brightness and moving the mouse to the tab, nerves on edge with Leo napping on the bed.
You clicked it and your eyes widened.

"Wattpad?" You whispered, seeing the familiar home screen.
He was logged in.
You felt so sneaky, it felt kinda good, being on edge like this. You scrolled through his library, snickering at the type of books he's been reading, when you clicked on his personal information page.

'He's written so many books!' You mentally shouted. 'And most of them are.. TMNT! OHMYGOSH I READ THIS ONE! AND THIS ONE!' You were freaking out a little. This definitely topped the Captain Ryan shrine. Suddenly you were lifted out of your seat, and away from the computer.

"How much did you see?" Leo whispered in your ear.

"Enough to blow your Captain Ryan shrine out of the water." You giggled. Leo gasped and placed you on the bed, then logged out of Wattpad and closed the computer.
"If it helps," you started, and Leo turned to look at you, "I've read your books, and they're really good."

Leo chuckled and placed a large green finger to your lips.
"Not a word missy." He ordered.

Donnatello

You entered the Lab as usual, expecting Donnie to be waiting with a wide gap- toothed smile, but he wasn't. He was at the far side of the Lab, with a computer.

"Green eyes.. no.. blue.. no.. brown maybe?" He muttered, scrolling thru a website.

"Donnie, what're you doing?" You inquired, making him jump and snap the laptop shut.

"N-nothing, how are you Baby Doll?"

"Don't change the subject Donnie." You frown, and take the laptop from him gently. You open it and see a website selling contacts of various colors.
"Donnie, what's this?" You ask, letting you voice show your distress.

"I-I-I've been looking for contacts, for.."

"For your eye color.." You finish, not bothering to hide the pain in your voice. "Whats wrong with your eyes?" You object. Donnie hangs his head in shame.

"What isn't?" He replies. "They're scary, a-and red is the color villains have, my brothers still get spooked by them!"

"Because they're so beautiful they catch you off guard. Your eyes are beautiful Donnie, they're unique, and different! And I love them."

Donnie glances at you with his sad brown- or red eyes, tears visibly welling up.

"Really?" He whispers.

"Really really." You respond, and kiss him. When you part he smiles sadly.

"Ok, no more shopping for contacts unless I really need them."

Raphael

You couldn't believe you were doing this. It all started with that picture, now you were slowly approaching Raph from behind, about to try and tickle him. You didn't know why, you were just curious.
Right now Raph was focused on beating his personal record of weight lifting, which if your plan succeeded, he wouldn't complete today.
You inched closer, hands outstretched, preparing to contact with his green skin.
Closer..
Closer..
You began to tickle his sides, and got an immediate response. Raphael dropped his weights and collapsed to the floor, roaring with laughter. His response gave you the courage to continue, as you grazed your fingertips over his armpits and sides.

"No! No! Stop! Please!" Raph begged, gasping for breath as his laughter ceased, if only for a moment.

You hesitated to resume, which gave Raph the opportunity to attack your sides, grinning from ear to ear. You fell to the floor in a fit of giggles as his large fingers found your weak spot, and tickled you mercilessly.

"R-Raphie, p-please!" You giggled, holding your stomach in pain.

"Revenge Sweetheart! Revenge!" Raph bellowed, not letting up.

"I'm sorry!" You gasped, but Raph continued.

"Heheheheh!" Raph taunted, finding another tickle spot. You wiggled and squirmed as your laughter echoed around the dojos walls. It seemed as all hope was lost when....

"RAPHAEL!" Master Splinter bellowed, making Raph halt, giving you a moment to breathe.

"Yes, Sensei?" Raph responded.

"Please tickle your loved one somewhere else, I am trying to meditate." Then Splinter returned to his room.

Raph gave you a devious smile and scooped you up, carrying you to his room, and chuckling the entire way.

Michelangelo

You where sleeping on the couch one day, when you heard a commotion in the kitchen, drawing you conscious. You sat up and listened closely, recognizing Mikey's voice. You stood and made your way to the kitchen, peeking inside. Mikey sat at the table hunched over. You walked a little closer to see what he was up to. He didn't notice you yet as he picked a soft pink coloring pencil, and continued. You inched closer, and let out a soft gasp as his work.

"Mikey, it's wonderful!" You whispered, turning his attention to you.

"Y/n! No! You can see it yet!"

"Ok, ok. I only saw a little. I didn't know you could draw." You smiled.

"Well I was gonna surprised you. But now you know, you'll have to wait to see it! It'll be worth the wait, I promise!" Mikey grinned, kissing your cheek. You giggled and left him to continue his masterpiece.