Have you read Shield Hero or watched it? It could have been anyone in her position (well like some in the Novel are and they get what they deserve), but have you read what she has done? Getting renamed to Bitch is better than getting killed. After all that humilation she gave everyone and even her own family (who she wanted to kill too) she came away quiet good, because she has the slave crest only that she cannot lie anymore which is great for that shit character. It's also great when you know what else happens to that character and why everything happens, but that would be a big spoiler (not the webnovel that had other plans). The only thing that irks me is that they talked about Raph and Filo having their crests removed, but they don't do that or rather they redid the seal (they already lost them once) because they get "extra exp". Otherwise their slave crests or status is never a thing again in the series.