Karai and Lizzie were patrolling the city and stopped on top of a building

Karai: The turtles have been spotted in this neighborhood so stay alert for any sign of them

Lizzie: they shouldn't that hard to find since they're Teenage Mutant Ninja Turtles

They both see the turtles fighting the kraang

Karai: they're fighting robots?

Lizzie: that's new

A Kraang brain crawled out of the robot body

Karai: whoa This town's more interesting than I thought

___________________________________

Lizzie and Karai went back to shredders lair to tell him what they saw

Karai: Father. We spotted the turtles fighting some guys in suits but they were actually slimy brain squids in robot bodies!

Lizzie: I know it's hard to believe but it's true

Shredder: Your mission is to destroy them and find Splinter. Everything else is a distraction!

Karai: Distraction? Father don't you want to know what's going on? Robots and creatures? Splinter's students are turtle mutants! don't you think we should be finding out what's going on? there's more to life than your vendetta

Lizzie wasn't going to talk back to the shredder

Shredder: There is nothing more. Have you forgotten what Hamato Yoshi did to us? Every day that Splinter lives is a stain on our honor that we must wipe clean. Stay focused on your mission

Lizzie and Karai: yes father

___________________________________

Later that night Leo was patrolling the city on top of a building then turned around and saw Karai and Lizzie but wasn't surprised

Leo: how did I know you guys would show up?

Karai: because your not good at hiding from us?

Lizzie: your not exactly hard to find

Leo: like last night

Karai: on were you there? We didn't notice. We did see a bunch of robots though. What's there deal?

Leo: there is that there very dangerous stay away from them

Lizzie: sounds like fun

Karai: we like them already. Something else is going on what is it?

Leo: I'm not sure I should tell you anymore. Raphael says I can't trust you.

Karai: He makes a good point. Eventually we are going to destroy you

Lizzie: don't worry. I'll make it as painless as possible. Let me handle him Karai.

Karai: he's all yours

Lizzie attacked Leo

Leo: I don't think you want to destroy me

Lizzie: really? Then explain what I'm doing right now!

She swung her scythe towards Leo but he dodged it

Leo: I think it's a cry for help. I think your looking for a way out of the Foot Clan and I can help you.

Lizzie: your so cute. Stupid but so cute

Leo: r-really? You think I'm-

Lizzie tripped leo but he got back up. Karai and Lizzie both pointed there weapons at him

Leo: You want to play games? I can handle it but I need your word that you will not attack my brothers.

Karai: You know we can't do that.

Leo: Then understand this. If you come after them I'll come after you two. Hear me?

Karai: loud and clear

Lizzie threw a smoke bomb and they disappeared

___________________________________

Later that night Karai and Lizzie followed the turtles into a kraang lab

Donnie: it looks like they're collecting DNA from every plant and animal species on Earth. I wonder what they're doing with all this DNA.

Leo: Whatever it is it can't be good. Let's shut this place down.

Mikey noticed Raph wasn't with them

Mikey: Hey where's Raph?

Raph finds Karai and Lizzie and pins them both down

Raph: Gotcha!

Leo: Karai! Elizabeth!

Donnie: Ka-who?

Mikey: Elizabeth?

Raph: Bet you think your both pretty slick.

Karai and Lizzie get back up and throw him on the floor

Karai: we have our moments.

Lizzie: good to meet all four of you

Donnie: uhh you to?

Lizzie and Karai started fighting Raph

Leo: Raph Karai Elizabeth! Stop it!

Donnie: Okay what the heck is going on here? How do they know them?

Mikey: Yeah and how do we know them? Wait. Do we know them? Also isn't Elizabeth a long name? I'm thinking Lizzie or Liz for her nickname

Karai and Lizzie dodged all of raphs attacks

Karai: So this is the stuff that turns people into monsters? How does it work?

Raph: Why don't you lean in a little closer and I'll show you?

Lizzie kicked Raph in the stomach

Leo: Enough! Your gonna set off-

He accidentally press the alarm button

Leo: an alarm...

Lizzie: now your just doing our job for us

Raph: Nice going Leo. Your protecting them? What is wrong with you? They're bad news

Leo: no there not!

Karai: yeah we are

A bunch of kraang robots entered the room

Kraang: The ones who are not authorized by the authority of Kraang to exist in this place will now be destroyed by Kraang

Karai: this day just keeps getting better

Lizzie: do they always talk like that?

Karai and Lizzie started fighting the kraang with the turtles

Leo: Look see? They're on our side.

Raph: Are you even listening to yourself?

Karai: We like your brother Leo.

Karai and Lizzie sliced multiple kraang robots in half 

Karai: He's almost as entertaining as you.

Lizzie: but your way more fun

Raph: when this is over I'll show you how entertaining I can be

More kraang arrived with a giant laser cannon

Leo: we're trapped!

Karai: no your trapped

Everyone looks at Karai and Lizzie who are standing next to the giant computer

Karai: what happens if i do this?

She is about to press a button on the computer

Raph: No!

Leo: Don't do that!

Kraang: Highly undesirable outcome

Karai: well now I have to

Lizzie: lets see what this stuff can really do

Karai pushes the button and the DNA combined with the mutagen and created a mutant monster. The kraang started shooting lasers at it

Karai: that is wicked

Lizzie: I wonder what else that stuff can do

Karai picked up broken Kraang robot body

Mikey: how am I going to name this?

Karai: good question. Well bye

Lizzie and Karai headed towards the exit

Leo: Your not gonna help us beat this thing? It's your fault!

Karai: we'll let the hero's handle it

Lizzie: have fun losing!

Leo: I trusted you!

Karai: I know! That's messed up right?

Lizzie: good thing you didn't listen to your bothers!

Karai and Lizzie both escaped the kraang lab

___________________________________

The two on them returned to the shredders lair and Karai showed shredder the robot body

Karai: The robots. we've seen them up close. They call themselves 'the Kraang'

Lizzie: kraang can do more then just turn humans into animals. They can make mutant monsters

Shredder: I told you I am not interested in this robot fiction. I will hear no more of this!

Karai held a kraang controller

Karai: I think this is how they control their robot bodies. Maybe we can use it?

Lizzie pressed on button on the controller and the robot hand moved

Shredder: Very well. I want you to find out all you can about this Kraang Their technology may prove useful in our fight against the turtles. Well done