Honestly, I wasn't going to return to this fic despite the positive feedback due to lack of time... but then.. A SWARM OF PLOT BUNNIES!
This chapter is all about Donatello (sorry I can't really write for him) but I hope you like it anyway.

Thanks to all you who reviewed/followed/faved this fic.

"How are you, Donnie?...I'm fine, how are you Donnie?... I'm fine, thanks... Good, good!" Donatello murmured as he sat on the cold floor of his allocated testing room. He was talking to himself and shaking rather violently. He wasn't fine like how he told himself. Some time had passed since Donatello had gotten separated from his brothers and thrown into a testing room; alone. The turtle had lost track on how long weeks back... or was days back? Or was it years back? Honestly, he didn't really care how long he'd been in this room for; he just wanted to leave.

After the purple-clad turtle had gotten placed into this testing room, he was told that he was going to undergo simple tests to see how he and his body reacted to different substances. They tested most things on him... shampoo, salt, deodorant, hydrochloric acid, vinegar... things like that. Some of which did considerate damage; bleach being an example of one. That wasn't limited to physical damage either. Some of the substances they placed on the terrapin messed with his mentality, driving him a little insane, which; when added to the stress of the experience, led to the creation of Donatello's new habit of conversing with himself.

"This is like animal testing," Donatello said aloud. "I hate animal testing, it's disgusting! There's much I will do in the name of science but never that."

"That's probably because you are an animal yourself," Donnie replied in a deeper voice.

"Even if I were human I wouldn't test on animals... the harm testing does... it's horrible," Donatello argued. For reasons unknown, when Donatello talked to himself, he always disagreed with everything that was said to create a debate-like scenario.

"Well humans value their lives more than those of animals. I don't know why you're arguing to me about it. Even if you're against the testing of animals, it's not going to stop anytime soon," Donnie pointed out to himself.

"You're me! I'm aloud to voice my opinions to you."

After that, the ninja turtle fell quiet. Not because he felt the conversation was anywhere near over, but because he heard a sound outside his door. "Who is it?" He called. "Probably one of the scientists," he murmured in a lower voice. The turtle was correct. Moments later, a tall woman with a clipboard held close to her chest opened the door and smiled down at the turtle who still sat on the floor, scrunched up into a ball.

"Hello, Hamato Donatello."

"Hello..."

"...you shouldn't say hello you idiot, she's watching everything you say and do to report to the other scientists about your mentality. You said you were against animal testing. Now is your chance to take a stand against it. Say nothing. Don't be kind to her..." Donnie told himself strictly in a deeper voice to his normal one.

"...I know what she's doing but talking to myself isn't the best way to prove I'm not mentally unstable. We're just giving her more to report about. Be quiet..."

"...who are you saying be quiet to..."

"...myself apparently..."

"...oh let's just shut it already!"

The woman scientist wrote down quickly on the clipboard as Donatello argued with himself and by the time he finally got himself quiet, she's gotten all the information she needed. "Mentally unstable, with a split personality. Solvent glue has a bad effect on the body," The woman read quietly to herself as the turtle sighed. Great. "I'll report this back, see you later Hamato Donatello."

"Bye Lousie."

The scientist closed the door behind her and Donnie rested his head against the wall. He was really going mad. With every experiment he was getting less and less sane and his split personality became harder to suppress. A split personality was never a good sign. Donatello understood that the most and to keep his sanity in check was difficult. Luckily, the split personality only came out when he spoke and never invaded his thoughts.

'I wonder how my brothers are' The ninja thought. 'I told Mikey that if I saw Leo or Raph that I would try to treat their wounds but I still haven't seen them. I wonder if they got it off better than I did? I hope so. I can't imagine it worse than a split personality.' Donatello closed his eyes. 'I wonder if Mikey's gone in for testing yet... I miss him. I miss his childishness. I even miss Leo's strictness and Raph's bad-boy attitude.'

"Where are you?" The turtle whispered.

"...Dead would be a logical assumption."

"...Not you again! There is no way their dead... no way any of them are. I'm more likely to die before they do."

"...Splinter is dead, and he was stronger both mentally and physically than us and our brothers combined."

Donatello's eyes shot upon and a rare anger built inside him. "...SHUT IT! Don't you DARE talk about Master Splinter!"

"...I can see its a touchy subject!" Donnie bit his lip and felt blood pouring down his chin. He has to calm down... now... he wasn't going to lose his temper over something he himself was saying. "These are your own opinions, Donatello. You may feel all angry but you know it's true. The chances of all your brothers being alive if you see each other again is barely possible."

Donatello glanced down at the floor, a sad look on his face. "I know the chances of me seeing my brothers again are slim... painfully slim... but... yet... I can't help but feel we'll all see each other again. All of us together. Some damage may be done to our mentality, bodies and emotions but we will see each other again... I can feel it. I can feel Leo and Raph and Mikey are still alive and breathing."

"That's just wishful thinking and you know it."

"I know... but I can't help but hope."

I always wanted to work with a character with a split personality and since I'm writing a book with a character who has one, this is perfect practice for me.

I hope you liked this chapter guys and I will see you soon for the next one.