JoJo's Bizarre Adventure vs Persona
Connection:
Both are the main villains from the fourth installments of their respective franchises (Diamond is Unbreakable and Persona 4 respectively) who use their connections to spiritual and/or otherworldly phenomena (Stands and Personas respectively)
Both are seemingly average guys who work unassuming jobs in rural Japanese towns. But beneath that facade of normalcy, both are heartless serial killers, targeting the poor women of their town. They were primarily motivated by lustful desires before doing it just for the fun of it, and were eventually brought down by teams of teenage heroes (The Joestar Group and the Investigation Team respectively) who could also utilize spiritual beings. After being defeated, they would later reform and kinda become good guys (Kira in Dead Man's Questions and Adachi in Persona 4 Golden)
Both killed their victims in ways that don't leave leads that could be tracked by the police (Kira uses Killer Queen to explode his victims completely while Adachi sends his to the the Midnight Channel where they are killed by demons)
Both their powers are seen as a mirror image of sorts to the protagonist's (Kira's Killer Queen has the power to destroy anything with a touch, while Josuke's Crazy Diamond has the power to fix anything with a touch. Adachi's Persona is Magatsu-Izanagi, which is a dark, twisted version of Yu's starting Persona, that being Izanagi)
Both also have weird fetishes (Cabbage and Hands respectively)
Both also dislike having friends or at the very least, dislikes hanging out with other people (Kira being practically always alone and keeps it that way for the sake of his "normal" life and Adachi believing that true freedom lies in solitude)
In contrast, Kira is associated with wanting a quiet and ordinary life, whilst Adachi grew bored of the life he lived in the quiet country town of Inabi
