Personality. Poison Ivy is depicted as being a seductive temptress who is fully aware of her beauty and will use it to get what she wants, aided by the pheromones her unique biology provides for her. When the Joker took over the Asylum, Isley was one of several individuals he freed, before spraying them with mutagen. Isley mutated a mutant plant-like monster, a change that she very much enjoyed. a misanthropic botanist and biochemist who possesses a poisonous touch, enhanced physical abilities,