In "Heroes of Mandalore" (Rebels S4, Ep. 1–2) we talk about Mandalorian warrior culture, the ethics of imperialism, the darksaber, and the importance of family. Also, it's been a long time since Bo-Katan crashed into her sister's throne room with Ahsoka in S7 of The Clone Wars, so we speculate a LOT about what she's been up to.