These are erin bates and shaunee cole also known as 'the twins' though they look nothing alike. They have moons on their foreheads beacuse that is their mark as a fledgling (young vampyre) in the house of night school
They both have affinites given to them by Nyx the godess who personifies night. Erin has an affinity for water and shaunee for fire.
hope you HoN fans like it