Sadly, I think of a young lady I know aged upper end of primary school who is quite tiresome as she is so entitled. It's not her fault, she is doted on by financially comfortable parents (the kind who can fund numerous hobbies with all the kit etc), she wants for nothing and is rarely contradicted in any way. I don't think she's a bad person, she's the product of her parents, but don't enjoy her company unfortunately as our children are connected so I do see her regularly. That's the only Martha I know.