It is rude to intentionally misgender someone.
Harry's friend Tina has recently transitioned and used to be known as Tony.
Harry wants to express his disapproval of Tina's transgenderism.
Harry says he is not comfortable with Tina's choice, but refers to her by her new name and gender.
"Harry continues to call Tina Tony and refer to Tina as ""he""."
Harry grows more comfortable with Tina, and the two remain friends.
Tina stops hanging out with Harry, and the two stop being friends.