Yukiteru's astute friend who investigates crimes linked to Yuno. He battles her, uncovers her timeline conspiracy, warns Yukiteru, and is killed by Yuno. His deductions are later confirmed by Muru Muru.
Aru provides critical tactical support and deductions, acting as a reliable friend and strategist for Yuki.
Aru's investigations threaten Yuno's secrets, forcing her to use extreme measures and creating tension.
Explore the full interactive character relationship map of The Future Diary