Well, they charge those things before you sit down for your meal. So, in a way, they are included. Unless you want to give more of a tip, it's already taken care of by the time you are at the table.
I don't know about Ariel's and can't remember about Minnie's.
I was wondering this as well. I remember when I bought the Costco DL travel package in the past it came with a free character meal...and I thought the value of each adult voucher was $40??