Not quite pseudonymous - she says her name is Iris Alexandria and that she's affiliated with the IGB in Russia and is now collaborating with the MEPI in producing more and measuring samples and that this is the reason why she doesn't publish any data as it's not hers and is bound for a publication, and that some of the researchers there are familiar with alternative superconducting theories which LK99's late PI was basing off on.
Of course it could all be faked, but she is prima facie attaching real, professional identities to her claims.
Of course it could all be faked, but she is prima facie attaching real, professional identities to her claims.