Tangential Q but looking to have a backup option in case my PP upgrade to J on ANA fails. Does ANA let you use miles from a family account to upgrade your ticket. My brother has ~28K ANA miles but he will not be flying. IF they offer me an upgrade at airport can I use his miles if our Mileage accounts are linked via the family thing (So amazingly annoying Amex transfers are not instantaneous...)? Thanks!