Nina was acting like a marriage counselor for this one. Not saying specifics and just going “how does this make you feel?” “In what way do you feel this?”
Jokes on Nina, arguments and mutual hatred are the foundation of this friendship. The way to go is to ask them what they like about each other, and to say it gently and politely, because enna will cringe.
See Nina needs to remember best friends don't say positive things to each other. They trash talk to each other all day long. The friend that insults you, that's your homie. The friend that is always nice to you SUS!