Maybe we're thinking about it the wrong way. Maybe she picked Serge because he was the only one in a position to do something about her own fate. If Schala still had her rational and compassionate mind at that point (and she did) and had even a glimpse of possible time lines through her forced union with Lavos, is it not possible that that she hand an inkling, subconscious or otherwise, that helping this particular boy might, in the long run, help her own situation?
Ah, now we're getting somewhere! I like that angle on it.
I find it hard to imagine Belthasar planning around Schala creating Kid. Messing around with destiny to control time, okay, that's plausible for a fictional story. But having the plan also revolve around the emotional state of someone who's off
outside time, and expecting them to do something as unique and bizarre as reaching out from that space beyond time to make a clone of yourself... something we never would have even imagined as possible in the Crono universe beforehand...
...that's getting more difficult.
However, I think there's some room here for Belthasar to "play around." He may not have known how
everything would work all at once. (realistically, this would be far more likely than the alternative
) He might have had to set up a timeline, see that indeed, this is how it turned out, but there was something unexpected, and he had to go back and fix something, or program the Record of Fate so it turns out
this way... and Kid might not have been in his original plan.
But with this plan being bent on saving her, his efforts to get closer to a timeline where that happens could have caught her attention. The possibilities would become clear to her. If only we could get
this to happen in this new timeline... if only Serge, Wazuki and Miguel could reach the Flame... And she might have just filled in the gaps he needed as his plan was in progress.
It still sounds kind of fanwankish, though.
I just reviewed the plot summary here and realized I was a bit mixed up in my first post, too. I remembered Kid's birth and the storm as being linked for some reason. I forgot that Schala had to interfere
twice - once to create Kid, and then again to create the storm alone and help Serge. This seems odd enough in itself. If creating the storm was to save Serge, what prompted the creation of Kid? And if the creation of Kid came first, taking all those "good happy side" thoughts with her, wouldn't it be harder for Schala to interfere again? Although it sounds like there's some mixups in how old Kid is anyway, so...
Gaaah... No talk rubbish! Mijae head go boom!