Scenario time! Meeting Tohru Adachi

This idea popped into my head while browsing the Adachi tag on tumblr, and was (somewhat) surprised to see how many people like him...and how many believe he did nothing wrong, and tried to defend his actions.

So, I was wondering what would happen if certain characters met him with the full knowledge of what he has done within the persona games? It can be one of your own characters, a character from a different persona/atlus game, or a different series altogether. 

The scenario plays out like this; the character in questions find them self in a dark, nearly empty room. The only visible items there are a table, two chairs, and a man sitting in one of them. The character is instructed by a mysterious voice to go sit in the chair opposite of the man, who is revealed to be Adachi.  The voice then tells the character everything Adachi has done, with Adachi admitting to ll of it in his usual non-nonchalant tone. Afterward, the voice informs the character they can do anything they want to Adachi, even kill him if they see fit. It should also be noted that said character will have access to all of their in universe abilities, skills, and/or weapons, and that Adachi would receive no aid outside of his persona, Magatsu Izanagi and his gun.

With all of this knowledge and freedom, what would the character do? (Note: This is headcanon friendly)

I would really like to see what you guys do with this.

EDIT: I forgot to mention this; whether the full cast or a single member of the cast from P4 shows up or not during the character decision and what actions they take(if they take any) is up to you.