[Question] The origin of Omen animations

So it's very clear to clock the Harald Knight skeleton and animations from the Dark Souls 3 Ringed City DLC as soon as you come up against an Omen.But I recently saw someone mention that this skeleton and the animations for it were originally from Bloodborne, and were already being re-used when placed on the Harald Knight enemies.

I haven't played Bloodborne, so could anyone tell me if this that true? I couldn't find any confirmation of that anywhere when Googling.