What if Cerise joins Faceless Men

Cerise literally changes identities like she's changes clothes and she does it without raising suspicion (which is kind of nonsense) so the only explanation I can think of is that she's part of the Faceless Men (a guild of assassin-priests who worship the Many-Faced God and have renounced their original identities and can adopt the appearance and identity of someone else).

Meme by KeybladeMagicDan