Eren observed that Alephee was describing things about Homunculi to Kirin patiently. But she never called herself a homunculus.
Alephee was still connected to Eren's mind. As such, she could sense what he was thinking. She looked at him and smiled before speaking up.
"You are right, Eren. I don't see myself as a homunculus because this is just a temporary vessel for me. I would find myself a real vessel when the time comes. With your help, it is completely possible."
Alphee said, making Eren remember why Eliza had zeroed in on him in the first place. His constitution as a slime half-blood and his connection with Reen. They were the right raw ingredients for creating a real vessel for oneself, which was seen as even more of a taboo than creating homunculi.
Alephee knew what Eren was thinking so she clarified it in a serious tone.