Sense it's been a bit and Both Eternal Augar and Silent Salt Cookie are released, how do the bad batch trio think of the Eternal Sugar and Silent Salt and what would the two beasts think of them?
I've already discussed Eternal Sugar a bit here.
In summary: The kids think she's psycho, and ES looks down on them as "not knowing any better" like she does with most other cookies.
As for Silent Salt... hoo boy.
I think, in terms of Gingerbrave's arc specifically, interacting with SS would be a major turning point for him when it comes to understanding the kind of world he wants.
Because, they're honestly really similar. And I think they'd pick up on that. They both know what it's like to have everything ripped away from them. Even their own lives. (Though SS gave up his body/life willingly for the sake of the ritual, Gingerbrave did not.)
It might start off hostile between them, but with enough time interacting and learning each other's stories, they'd probably come to an understanding. Maybe even have a bit of respect for one another.
I think Silent Salt Cookie would be capable of actually earning Gingerbrave's trust.