rich of them to call it betrayal, after blackmailing her to join and multiple members trying to kill her
I mean, they've been establishing since the guild's introduction that it's full of people who think it's okay to do whatever they want to other people, but as soon as someone does the same to them they freak the fuck out and act like it's some great injustice.
See: Keela getting pissed that Aria scratched her face... after she tried to carve up Aria's for her own amusement. Radha setting out on a furious quest to avenge Guy, acting like killing him is a grave sin... despite the fact that they're assassins and have killed countless other people without remorse. And now, Dwarf guy paranoid ahout betrayal... when Aria was blackmailed and coerced into joining the guild in the first place.
I have to admit, I'm a really big fan of the archetype where a character who goes on and on about how "might is right" and how being able to do what they want is merely the privilege of the strong and that the people they trample shouldn't feel wronged because it's their own fault for being weak will
immediately crumble as soon as they're the "weak" one, instead of accepting that, by their own logic, this is merely survival of the fittest. The downfall of such hypocrites is always a satisfying thing to see.