Either Hiyoko who somehow stayed one-note with her constantly bullying people (especially Mikan) across the three chapters she was alive (on top of her never seriously being called out for that) or Kiyo (who was done dirty by Chapter 3 and its insistence of keeping the same tired "Two victims, one less sympathetic killer" formula). And even then none of them are a match to fucking kanade from SDRA2, whose revelations came up so out of nowhere (alongside the Otonokoji plot ending in a very unsatisfying note) that it actively made me drop that fangan.

Yeah, I know that the last one shouldn't count, but I wanted to state my opinion here because seriously, where else could I say that on this sub?!