I have Athena. Her defense down to the target and nearby starts at -41% and caps at -65%. Most useful against red titans and red tanks because of her strong color against them and that she deals extra damage against fire. The only other hero who can do what she does is a 3 star nature hero, costumed Brienne, only that the latter applies to all enemies but does not deal damage. Costumed Brienne is good with Kvasirs around as the minions speed up the defense down cap with just a few turns. Yummy.
