-Amnesiac manga/anime protagonists that are several people stuck inside of one body, They team up with a girl that found them and is kind of adopted into her life as they try to find their true identity.
-Despite organizations trying to take them out for good, they will fight whoever they need to in order to solve their life crisis, no matter what.
-Along the way they are hunted down by "humans" who want to kill them because of their past identity and they gain otherworldly powers that only certain people have
-Also they Contrast in the sense that Gappy eventually defeats an enemy that hates humanity and wants to be above them vs Kaimen who ends up being revealed to be part of an eldritch entity that is literally centuries of pure hatred towards humanity
Got the Gappy things from here • ジョジョリオン　カラー版告知映像
I own nothing besides the editing