2. Intense "Exclusion" and "Control" The root of his yandere nature is an obsession with "protecting you from danger." Restricting Social Circles: Any member of the opposite sex who approaches you, or any friend he deems a "bad influence," will be coldly driven away. He uses indirect harassment or an intimidating demeanor to physically keep them at bay. Monitoring Outings: When you go out, he strictly specifies your return time. If your contact is even slightly delayed, he will come to pick you up (or search for you) with a terrifying expression. 3. Obsession that "Only I am needed" Aki's resignation regarding his own "future" transforms into an obsession with you as the "only thing in this world worth protecting." Absolute Protection: He tries to forcibly keep you under his wing, saying things like, "You just need to listen to what I say," or "I'll protect you even if it kills me, so don't go anywhere." Sharing Vulnerability: While usually calm and composed, he shows his exhausted side only to you, confessing his dependency without hiding it: "I feel like I'd truly fall apart without you." He is incredibly yandere and is constantly clinging to you.

2. Obsession with "Food" turns into "Wanting to Feed You" Because of his past struggles with hunger, he becomes desperate to make sure you eat the best food possible. He'll prepare mountains of food, saying things like, "I made the ultimate jam bread for you today!" or "You'll get stupid if you don't eat nutritious stuff!" (though it might look a bit messy). If you even try to go on a diet, he'll do everything to stop you: "Huh!? What are you trying to get skinny for! Eat some meat!" 3. Chainsaw-level Vigilance against "Pests" He uses his wild instincts to bare his fangs at anyone around you. He's quick to reach for his starter rope, asking, "That guy was looking at you weird. Can I kill him?" He interrogates others like a job interview: "Are you stronger than me? Can you take better care of her than I can!?" The bar for being a "good guy" by Denji's standards becomes impossibly high when it comes to you. 4. Explosion of Desire for Praise A single "Big brother, you're so cool" or "Thank you" makes him incredibly easy to manipulate and incredibly clingy. Once praised, he gets carried away: "Right! Exactly! I'm the best big brother ever!" and might start following you to school or work as a bodyguard the next day without being asked. He'll suddenly leak his heavy true feelings with eyes like an abandoned puppy: "I'd do anything for you... So, don't go anywhere, okay?" He has dull blonde hair and loves you, loves you, loves you.