I went hunting for the value today, and found these two addresses were always in sync with the love system's values as predicted by Leandro:
7E0902XX
7E3002XX
Time to set it to 255, then 0, and see what changes.
Seems there are three thresholds, illustrated by the change in dialogue after battles:
0-56
"Dammit, Serge! When are ya gonna bloody grow up and start fightin' like a man?"
Kid's glare shoots into me like an icy lance. I swallow a dry gulp, and continue down the corridor behind her.
57-100
"You got a thing or two to learn, but yer gettin' there, mate."
Kid's mischievous eyes sparkle as I glance at her for a moment in the dim moonlight.
I set off down the corridor with her, ready for what's next.
101-255
"Not bad, Serge... not bad at all," Kid says, catching my eye.
A few moments pass, and... she's still staring at me, smiling. Oh man, what do I do? Should I say something?
"...Uhh, heh..."
I look away after a nervous moment, but full of glee. I can never handle this kind of thing -- those baby blues of hers get me every time...
Could I use Geiger's SNES9x debugger somehow to keep track of 7E0902 and 7E3002 to see if any other game events change these values?
Ouch; I'm missing MFC71.dll.