he might feel bad and think about amends, if he really likes you. but villains don't ask for forgiveness and never expect to receive it, so it's really on the victim to decide how they view him later
as an Arachne Flug can use his mind control paralysis venom to make it.. a little less horrible, but if he is frenzying from starvation he goes into a bloodlust slaughter mode where mercy will be the last thing on his mind