Flywheel finishes the bite she's eating. "Hmmm. Say it one more time?" (this is an insane thing to be competitive about! What are you doing! Why are you like this! she doesn't know!! But she wants to see if she can do better than a 7 out of 10...)

"'Tteokbokki'. 'Tteok'-'bokk'-'i'."

Huh. Okay, hm. "Tteok... Tteok...Tteok-bokk-i... Tteokbokki?" (She's not quite nailing the 'kk' sound, but she's got the rest of it basically down.)

"...okay that is very impressive actually. Is this the first time you heard this word? I don't think I can get rid of my accent in English like that."

(Yes! Sweet success hey, quick question! Why does she care about this, again? Is it because she's stupid?)

"Don't think I've heard the word before, but - I did take two years of Korean in undergrad? And... I have a decent ear for languages." (And accents! Hey, remember when -)

"How did you take two years of Korean and never hear this word before, what kind of degenerate teaches people Korean and does not introduce them to tteokbokki, I think this might be a crime. I might need to get Interpol involved."

"...iiit is possible I have heard it and forgot? I'm good at sounds but pretty bad at vocab, and -" and she hasn't eaten Korean food in a while!! But she really doesn't want to explain why, because if she explains it wrong maybe they'll think Tia is terrible, she's pretty sure Traceless already kind of does and she doesn't want that to be how people remember her -

"Well I'm gonna need to take you somewhere to eat proper tteokbokki. It's only fair."

Oh! Maybe she's not totally failing at being a person after all? "I'd really like that."

"Cool! After this stupid confluence is over, then."

She smiles. "Looking forward to it!" (...it takes her a few moments to realize she means that. Which is weird. And kinda fucked up of her, if you think about it? She's not supposed to be having a good time!!)

So scrungled.

But speaking of the confluence they should finish eating and get to doing some power stuff so they can kill big monsters.

Right, yeah. Flywheel can hurry up and finish her food.

This B rank dungeon has car monsters that try and run invaders over, which are a fair bit heavier than Cara and also much lighter than a sandworm, which seems like a good place to test their plan. 

Tae-hwan and Flywheel could probably have taken these cars on their own, but that is also the best kind of way to test their synergy. He's carrying Flywheel on his back, since then her power can consider both of them to be "the same thing", and they can get to practise timing!

A minivan with red racing stripes notices them with an excited beep of its horn and starts heading their way, picking up speed. 

Flywheel is alert, keeping track of the distance between them very carefully. "Ready."

As agreed, she'll dip into her power as soon as he links the two of them and the car, and she'll get the signal there. 

He jumps, so that they won't get dragged along the asphalt—it wouldn't hurt them, it would hurt the asphalt and be more backlash intensive—which causes both of them to be flying in the air going at the same velocity as the van, as if there was an invisible solid beam of matter attaching them to the van. Then he swaps the target so that it's the van that's attached to him instead, gravity starts to take effect, he gives the signal—

And as he jumps, Flywheel focuses.

She's at the center of the world. She's moving at 30 meters per second.

There's a minivan, moving at 30 meters per second. She could take its energy, if she wants.

The minivan is has about 12 times as much mass as Tae-hwan and Flywheel combined.

Kinetic energy is mass times velocity squared. Transfering kinetic energy from a bigger object to a smaller one scales the velocity by square root of their mass ratio.

When Flywheel takes car's kinetic energy, the two of them go flying in a slightly-upwards arc at over 100 meters per second.

And now they are no longer bound to the van.

(This is extremely cool wheeeeee~)

As she feels the link drop (air resistance causing their relative positions and velocities to begin to diverge), Flywheel tucks their momentum safely into her backpack, and the two of them fall gently to the ground.