Spoiler for Jojolion chapter 5:
So we finally see the enemy's face.
Lots of questions in this story arc like who is our hero and why does he have four balls?
It definitely feels like Part 4 with the mystery feel and the fact that it's set in the same place albeit an alternate universe version of it.
Gappy is probably the most eccentric Jojo yet, but he is rather endearing in that way and I like his awkward interaction with Yasuho.
I have a feeling that Yoshikage Kira may not be his real name due to the fact that all the Jojos in the series have had names that can be shortened to Jojo and I think it'd be odd to suddenly break that tradition. Perhaps Kira or an alternate universe version of him is the villain of this arc? After all that apartment has a lot of references to him and Steel Ball Run had an alternate universe Dio.