This is a pretty cool idea and I like that you've really done a whole story here!
The first song, I immediately get the alley way feel - the drums sound like someone beating on metal trash cans and dumpsters (beautiful touch!) while the melody screams a tense cat staring interaction.
You capture that tension again when the stray approaches. :)
I think I personally like Camilla's theme more than Emile's theme, that one was a bit too dissonant for me.
And the final song I can see them walking away together down the alley and turning the corner.
Love the idea and creativity here - great job!