You spent the most time in Donnie's lab, working different retromutagens, while he built machines, or trained. In fact, for the first couple of weeks, you pretty much lived in that lab, with pillows and blankets laying on the floor, where you got the couple hours of sleep a night that you could afford.

Today, you were working on testing the last couple of batches you had created, using the faux mutagen that you had mixed together.

The boys were all in training, and you poured the two together, carefully placing it in a centrifuge, balancing it out, and waiting the 10 minutes it took to simulate that passing of the retromutagen through the body and heart.

When you pulled it out, the color was clear.

When you put it under the microscope, the cells were normal.

You screamed and ran into the dojo, where you embraced Donnie, incoherently screaming about how you found an improved mutagen, interrupting their training session to pull him into the lab.

He looked and hugged you back, picking you up and swirling you around, his gap tooth completely visible with his enormous smile.

April ran into the lab, took one look at the microscope, and ran over to you, hugging you close, and kissing you on the cheek out of happiness.

When the rest came in, they celebrated along with you, and decided to order pizza, and have a movie night. You and April went out to get the pizza and some soda, braving the surface.

When you got back, Mikey came to greet you, picking you up bridal style and plopping you on the couch as the two of you digged in.

Raph sat down next to you.

"Hey uh..." he scratched the back of his neck, "I guess you're not all that bad."

You smiled at him, and nudged his shoulder.

"Neither are you."

You fell asleep in the middle of the movie, content with your place in their family.