Are repetitive posts a thing now? Also, if all else fails let Ben head for a cafe. Or bump into Cyril and Daisuke. Not literally because that'll be both cliche and weird.
A suggestion for Hasayo but why don't you have Naoto stay at the cafe to interact with some of the characters? Half of them are at the cafe. Unless you're going to interact with Benjamin who's roaming around.
That's what I had in the beginning since I based the three chosen off Sora, Goofy and Donald. But we also started basing them off Sora, Riku and Kairi. And I'm sure the latter two have keyblades.