JSK_Wilson
Author, I'm going to give this unpopular opinion and leave without elaborating: Reincarnator 2 (Senku) is the character with the most narrative potential so far.
Hozy:Basically, she is already completely developed, we readers already have a clear idea of who "Seika" is, her personality, her short-term goals and some actions she will take. That doesn't mean it's "cliché" or predictable, I for one am loving the turn of recent events, which is something I'm very excited to see unfold. As for the other reincarnators, we know almost nothing. We know some powers and some bits of their personalities, but you, as the author, have HUGE writing freedom about them. I specified Reincarnator 2 because it stands out among them, as you gave some details about it that gives us space to theorize with these few details, and I have MANY theories about it.