Primary

• Happy Son of Lucky
• Happy Son of Marl
• Happy In love with Carla
• Happy Friend of Natsu Dragneel

Extended

• Natsu Dragneel Friend of Happy
• Natsu Dragneel Younger Brother of Zeref
• Natsu Dragneel In love with Lucy Heartfilia
• Carla Daughter of Shagotte
• Carla Love Interest of Happy
• Carla Partner of Wendy Marvell
• Marl Wife of Lucky
• Marl Mother of Happy
• Lucky Husband of Marl
• Lucky Father of Happy