Lucy is a jailer that only appears within the manga. She was also the coworker of Danny and Cathy in XX State Prison. Lucys personality is of one that is infatuated with Cathy with each of her appearances revolving around Lucy somehow talking or thinking about Cathy. She is shown to be extremely violent constantly beating the people that speak bad about Cathy and always feels like her efforts to assist Cathy arent good enough filling her with anxiety. Despite this she is still rather loyal to her job instructing Danny of what reports he has to make also answering the questions of a female prisoner. Lucy wants to be deemed as necessary by someone knowing that without her the executions wouldnt be carried out. She is also rather submissive to Cathy constantly following her instructions regardless of what they are. Source: Satsuriku no Tenshi Wikia