Here is something interesting :
Diana is Apollo's twin according to Greek mythology. And both their vessels have almost equivalent figures (Kanon is 86-58-85, Tenri is 84-57-84, +-2cm). Though it remains to be seen why Diana is so much smarter than Apollo.
Interestingly, Diana is one of the goddesses sworn to chastity and not to marry, but she keeps seeking to have sex with Keima. Though her sister Minerva, who has sworn a similar oath, is marriage-proof and will have eternal virginity because anyone who tries to do either will have to face legal consequences.