Holding Nyx off is an unfair thing to ask of anyone. But if Makoto's anything like Minako in one important respect, he wouldn't leave the job for someone else to do, either.

"Well, that's not going to help anybody in the long run." Seriously, what did that poor girl's parents think of what she was doing? "This the Phantom Thieves or the TV world shit?"

Shinji knows the basics of both, but nobody mentioned anything like this.