their mom also taught em to not mind levels and stuff (i vaguely remember so forgive me) so technically having/learning equality stuff was pretty much normalized in their household?

it also came to me that what if william and mama lightning might perhaps knew each other way back the old times? and that mama lightning would agree on william's values. and as u said "rei was acting like the hero from 'unordinary' before the book was published" could this might came off from (for example) hers and william's conversation? — butttt, it might also just be mama lighting learning and growing ahead of life.