I know that you can glitch the inventory of any of the characters and access the values of data for the character behind them (in sequential order), but I started to wonder what values are behind Shir, since she is the last character on the list.

I am having a difficult time figuring out what the values are and how deep they go. There are a lot of null values, but the ones that do show up in her inventory (past slot 24, since 17-24 is just her status and name), at least up to slot 56, seem to change after every battle, and what they change to depends on which area you had the battle (for instance, getting into a battle near Paseo gives lower numbers but getting into a battle near Piata gives much higher numbers). I'm assuming the game keeps track of which enemy groups you've faced, but that is just a theory so far. Removing the item from these slots does nothing and they return after a battle, so that just furthers my assumption.

I'm going to play around with it some more and see what I can find. There seems to be a lack of save state hacking info out there to help with this part of the data. I'm also curious to see if anybody else has tried glitching Shir's inventory to see what can be found.

I never tried this, but that's a good question. Maybe if we'll be able to figure it out we can find some new skip for Nei% run(it won't be worth to pick Shir in any%)