I feelbad for Isabella, she's just a kid and her behavior is obviously bad cuz of her mom... You can see here and there that she just a hot headed kid and she totes doesn't feel like a bad person, kid be really scared and nervous all the time and trying real hard to be acknowledge... I don't think she can even understand the consequences of her actions that well =/
Sienna being negative is a given too, you can't expect 10+ years of abuse and gaslighting to evaporate in a matter of weeks, sadly. Its not impossible, but its unlikely as heck. Like, timeline 1 Sienna had to deal with all kinds of pain, suffering, false hopes and the despair of having your hopes crushed. She also has the constant anxiety of Lobitch popping up and trowing her into hell again.
I don't blame ger at all to be like that- opening u heart is hard even to normal peeps imagine her with that background, like, bruh. :v