Louhi and Piper

Can Louhi use his special to cancel an ally played via PIPER?

Name: Louhi
Cardtype: Vampire
Clan: Malkavian antitribu
Group: 4
Capacity: 10
Disciplines:
Sabbat cardinal: Once each turn, if Louhi is ready, she may burn 1 blood to cancel an action card played by a vampire controlled by your predator as it is played (the acting minion doesn't lock).

Name: Piper
Cardtype: Master
Master. Requires a ready anarch.
A ready unlocked anarch you control employs or recruits a retainer or ally from your hand (requirements and cost apply as normal). This is not an action and cannot be blocked. Lock that anarch.