I have this talk in my head about how Kakara is disappointed in herself, in that she hasn't managed to save Dandeer from herself, admitting her own anger at Dandeer stopped her from doing the right thing. Bring up her lying about what happened about the Sealing, and the thousands she killed, implying/suggesting that the reason Kakara has hated her so much is because of those.
Having Kakara bring up stuff like the rebels and traitors, about how she suspected Dandeer was behind it, but given her ability to erase knowledge, never delved too deeply, because she suspected that anyone who could prove it would have their knowledge erased(freak Dandeer out by how much Kakara knows).
How Dandeer threw everything away, and now has damned herself to hollow lie that won't give her what she actually wants, and that when she dies she'll go straight to hell. How Kakara would have fought tooth and nail to ensure that Dandeer would have received actual help rather then just be executed, in hopes of reforming Dandeer, so she could actually go to heaven, dropping the bombshell that Kakara has been there and talked to them.
All the while dropping details, like what concept the shackles use, then at the very end, when Dandeer almost certainly doesn't back down, reveal how to break said concept with Ki, so Yammar can break out.