Can you "Renew"

I want a skeleton maid for a necormancy kind of thing but I don't want to get it if I cannot renew it. So can someone tell me if NX shop Mini Pets can be renewed?

Does buying another count as renewing? Not like anything would change.

I meant, Do I have to delete my previous one then get another one?

According to the page, they "disappear" after they expire. You can own multiple mini pets, though, so if your worry is being able to get another, yes you can.

I think he means is it autodeleted or does he like need to delete it then wait until 7AM to make a new one with the same name.

You can't even name them, so there's no worry about whether or not they disappear or require to be deleted.

You can buy as many whistles as you want, but can only have around 80 characters & pets at once.

Unless you have gotten a permanent MiniPet from various Gachapons/events, you cannot renew the pet and is forced to delete it (or not...never used a 30 day one) and recreate it every time it expires. Be wary of the 80 Character Limit per account as well. Deleting it will free up a space however. I'm not sure about the name, but ti does become available for use after a while (probably 7am PST?)