Thank you! I'm really glad you like the game so much <3.
Cove changes based on the choices you make (and the choices you don't make, if events are skipped). If you want Cove to be exactly the same as he was in a previous playthrough, you'll have to make the same choices as before. Though, in the full game there will be an option to design your Cove directly. So you can also wait for that feature to be added.
And we're now accepting Paypal as a way to support the project, if getting a Visa would be troublesome.