Percy Jackson/Heroes of Olympus fans will understand.
Tristan and Piper McLean, Frederick and Annabeth Chase, Emily and Frank Zhang, Esperanza and Leo Valdez, Maria, Bianca and Nico di Angelo, Beryl and Thalia and Jason Grace, Sally and Percy Jackson & Marie and Hazel Levesque
Nico di Angelo & Hazel, children of Hades/Pluto. I love their relationship, so sweet. though my heart broke when he accidentally called her Bianca in Son of Neptune ... OOH I WAS SO MAD at nico when percy couldn't remember anything and nico acted like he didn't know him! >:(