Achenar liked poison. He liked the pretty colors and he liked the pretty ways they made pretty people die. No wonder, then, that he was so enthralled by his brother.
Sirrus was a poison. So irresistible. So charming. So beautifully god-like and ever-so-brilliant that no one ever realized he was killing them from the inside out until it was far too late.
Achenar was a prime example.
Achenar liked poison, but he loved his brother.