Ey
Pronounced like "they" without the th. Also like the Fonz says "Ayyy!"

Em
Pronounced like "them" without the th. Or like the letter M.

Eir
Pronounced like "their" without the th. Also like air. Airhead, eirhead, you get it?

If you forget, "they/them/their" is always correct.

"She" is only for my secret shadow council of advisors. 👀 🤫