How to get a Kali Linux LUKS master key (alias: is Kali encrypted persistence safe?)

I have recenty set up a Kali live operating system with a LUKS-encrypted data persistence partition, and used it for a while. Unlike Tails, fortunately Kali Linux makes use of a ISO9660-formatted partition for system files (it does not feature the kernel update facility however).

Anyway, my question is the same as for Tails (https://www.linuxtoday.com/security/tails-linux-encrypted-persistence-is-not-as-safe-as-you-might-think-181210020510.html): if I lend my USB key running Kali to an evil Penguin, am I sure to use it again afterwards?