I don't know Naoto very well, but I did see his post with Yu in regards to their experiment with the app, so I think he'd be a good addition to the team.

[ Yep, Souji doesn't know that Naoto is a girl so referring to her with male pronouns in this. ]

Did you and Yosuke make up enough to let him join?

[ In a teasing tone. He would at least hope that these two have made up or Yosuke didn't do anything dumb since last time. ]