>>532658574
Hmm, Leviathan, and the others are meant to protect humanity, but Wily could arguably be seen as a threat to peace and stability, akin to Ciel's rebellion. While there is a sadistic streak to her, I can't imagine her loyalty would cause her to do anything outside of the purview of her operation... so while she might rough him up a bit, I don't think she'd kill unless given the go-ahead by Copy X, in advance.
See, Ciel and Wily are both human non-combatant leaders - they control things behind the scenes - while Zero/Wily bots are effectively tools to exert their will. As such, Leviathan engages in fights with Zero, because he's an enemy combatant that can entertain her, but I can't imagine her murdering a human without means to defend themselves - especially if they're a high value individual, that could be made an example of in public.
Assuming Leviathan had bested a wily machine, and had the doctor pleading for his life, she would probably just apprehend her target, and bring him in for judgment. Of course, this is Neo Arcadian judicial system we're talking about, so I imagine it would be a little more strict than the Classic-era revolving-door penal system.