I completed the quest that you get when you talk to Cassedy about Soldiers With Guns, but how do I get Scuffy to trigger? I tried talking to Casssedy again, every option, I tried Elly, I tried Ryoko, I went to the gun factory and talked to everyone within it. I just can't seem to get the Scuffy recruitment scene to trigger.

I'm playing the android version, if that helps.

Edit: you have to level up Della a few times.