[ this...is going a lot better than he expected. a little too well actually. he wasn't expecting him to be this interested, let alone eager to join. Ryuji greatly appreciates his enthusiasm all the same though; and is silently relieved that Yuji's not secretly a cop, or working with the cops at least. ]

Weeell...[ Ryuji scratches his head. can anyone join? ] not just anyone can join.

[ technically speaking. granted, there are many people who they'd consider allies as they've greatly helped the Thieves in their operation thus far, and Yuji's most certainly welcome to join their ranks at the very least, but the real question here is whether or not he can use a Persona—which is arguably one of the cooler things about being a true Phantom Thief.

[ still, Ryuji grins, it's a wild almost mischievous grin. ]

You gotta have a special "power" to join. It's...kinda hard to explain though.

[ at least for Ryuji it is. ]