>>49914738
I like all the art portraying her as a tragic character being misused by the Lunarians. But after playing through her stage (after which her brainwashing is removed), she is very cheerful and carefree which seems to be her original personality.
And if we go strictly from the omake, even if the original Lunarians (implying they are different people for the sake of argument) who brainwashed her and forced her to process impurities for the Lunar Capital are evil as fuck bastards, Toyohime was nice enough as the administrator to get rid of her brainwashing (instead of overclocking her) and even set up the Pit of Four Seasons for her to feel at home. Whether this is true is up to interpretation though and may change when new information is revealed.