I genuinely don't think they know who she is, and it's not THAT ridiculous. Clare would always be vague and standoffish about her objectives, and Priscilla was never mentioned alongside the other super strong awakened beings like the Abyssal Ones, Rigaldo etc. I think they suppressed the incident and basically no one would connect this super strong awakened with the former #2 (and keep in mind not even the people on the Teresa assassination mission knew who Priscilla was until introduced to her).

But, yes, of course it's just a setup not to say "Priscilla is evil" in front of Raki, I just think the author played fair in doing so.