Haruka Sakurada is the sixth child and middle son of the Sakurada royal family, and he is the twin brother of Misaki Sakurada. At thirteen years old, he is a calm and composed individual who often serves as the straight man in response to the antics of his many siblings. He has a level-headed and collected personality, rarely getting swept up in the chaos that sometimes surrounds his family. His default approach is to remain rational and observant, a role that suits his unique talent.

Haruka has little to no personal interest in becoming the next king, which sets him apart from several of his more ambitious brothers and sisters. Instead, his primary motivation is to support the campaigns of his other siblings, particularly his twin sister, Misaki. He genuinely wants to help Misaki achieve her goal, and he actively works to assist her in her bid for the throne. This supportive nature extends to the rest of his family as well; he is known to offer advice and strategic insight to any sibling who asks for it, positioning himself as a reliable and helpful presence within the household. In their middle school, Haruka takes on the role of student council secretary, a position that reflects his methodical and supportive personality, while Misaki serves as the president.

The unique ability possessed by Haruka is called Lots of Next. This power allows him to effortlessly calculate the probabilities and potential outcomes of any given situation. This analytical ability makes him exceptionally good at foreseeing risks and opportunities, which is why his strategic advice is so valuable to his siblings' election campaigns. His role in the story is largely defined by this analytical support, as he observes the progress of the election and helps those around him navigate their challenges. Through this process, he gains new perspectives on his family members, noting their growth and seeing different sides of them as they strive toward their goals.