I'm sure this trend was broken in Add-On, Gold'n and Additional Add-On, but in the original P4TW, Naoto appeared in every single 100th comic in the series, so having Naoto appear in the 100th comic of the final chapter is kinda nice.
I went back and checked. Add-On had Labrys and the other robot she killed in her flashback, Gold'n was just Marie (and Yu's PSP), and Additional Add-On was Yu, Adachi, and a dying Kagutsuchi (none of the three made it to 200 pages). It was just the first and last, but that means that the trend bookends the P4TW saga, which I think is a nice send-off.
I went back and checked. Add-On had Labrys and the other robot she killed in her flashback, Gold'n was just Marie (and Yu's PSP), and Additional Add-On was Yu, Adachi, and a dying Kagutsuchi (none of the three made it to 200 pages). It was just the first and last, but that means that the trend bookends the P4TW saga, which I think is a nice send-off.