... well THIS is a really random couple.

Yuka X Pyro?

That's not the real Pyro, you can understand what s/he's saying.

It would make more sense if I could read it, but without the translations it kinda seems that Yuuka doesn't know where he came from and will kick his ass after a hearty breakfast he hopefully doesn't flambe.

Am I right or wrong here?

This is VERY unlikely, seeing how the Pyro might burn her flowers by accident. Then she kills him so bad that not even in hell they could not glue him together.

Flowers that burn are clearly in enemy team, and in the worst case spies! Yuka should thank Pyro for destroying these dangerous enemies.

Yuka her self got no idea who the hell it is!