Princess Carla spared his old party's lives. Eh... I didn't even hear about her punishing them, it's only implied at best and no punishment at worst.
I didn't even notice it the first time, but the princess also has what seems like a taxidermied alien torso decorating her room. Located in such a way that it's in view from her bed.
I don't remember her buying something like that from Gaile, but maybe she's been collecting super creepy kitsch like this even before she met him, and in that case this twisted sense of aesthetics they both share is part of why she's so infatuated with him.
Liznette ended up becoming his shopkeeper while he's busy with his mad accessory work. According to my notes she's not just an assassin, she was the assassin guild's leader. Pretty important person is now his employee.
Gaile's presented to the reader in a friendly way since we've known him from the start, but from an outsider, him talking to himself while dancing with a headless skeleton would be 100% bonkers territory...