They're misidentifying that LLM as a tulpa.
We're aware that some people use LLM output as a basis for the creation of tulpas, but this doesn't seem to be the case here. This seems to be a person attributing independent intelligence to an LLM external to herself, not recounting her experience with an additional consciousness within her own brain.
Whether or not you consider tulpas or other forms of plurality to be genuine phenomena, this conflates two different concepts which are tangentially related at most.
A tulpa is a type of supplemental consciousness capable of independent thought and with its own sense of self. It is created, intentionally or otherwise, by an existing consciousness within the same brain it comes to inhabit.
Yes, we are acutely aware that it sounds like preposterous pseudoscientific bullshit. We're just describing the concept, not expecting you to put any stock in it. We know what community we're commenting in.
The LLM in this example is not a tulpa. It only (poorly) mimics the appearance of independent thought and a sense of self, and runs on an external device.