Madam Octa - Larten Crepsley's spider. Madam Octa is a telepathic spider, and can do many different tricks. She is highly intelligent and poisonous, she can even be trained to control how much poison she injects. She can live up to 30 years, according to the monk who sold it to Mr. Crepsley. In the first book, she bites Steve causing Darren to go to Mr. Crepsley to ask for an antidote, but the condition is Darren must become a half-vampire in order to save him. Later in the series, Darren releases Madam Octa into the cave of spiders inside Vampire Mountain, where she mates and produces offspring, which are named after Darren; Ba'Shan's Spiders.