Laura's inner cinnamon roll personality came out for a bit there. Rubert turning out to be a bird boy companion is something I didn't expect. But at least Laura won't be lonely on her journey with this sentient sword with her.
Her grand entrance stealing the thunder of that party by oneshotting the guardian was funny. This kind of comedy is taking off more of the edge from this series with "Revenge" in the title, but I'm not complaining.
With this kind of less serious tone I wouldn't be surprised to see a twist where she sides with the demon king instead so she can free her sister, who's about the only person left in the kingdom she cares about.