Disposition Gain for Remaining Summoned?

Thank you so much, Trinhrich. That almost proves my theory.

We still need data from partners below and above 120, though now not just for testing out my hypothesis, but to add credibility to everything I've said in this entire thread as well, since I just realized that with the exception of Trinhrich's input, all information on this passive disposition change is a result of my own independent research alone, and thus has questionable credibility until others examine it as well. Kevin/Ikkisuki came close to that by admitting to trying, but ended up with an additional blunder of allowing his partner to starve by accident, inadvertently obscuring what he had gained. If a few people can quickly admit to trying what I said in this thread and observing it work, that will be enough.