Keep in mind that nightmare fuel for this show is relative; it is a sports anime, after all. Nobody's getting murdered. Probably.
- Murasakibara. His expressions and his attitude are both... unsettling.
- Kuroko isn't Nightmare Fuel incarnate, yet since you usually see him in a very calm and inexpressive mood, it's very unnerving to watch when he actually becomes angry. It's Tranquil Fury at its most terrifying.
- Akashi. Everything about Akashi. Memorably the scissor scene, where he was straight up intending to take a chunk out of Kagami and would've succeeded if not for Kagami's reflexes. So much for nobody getting murdered.
- Hanamiya "Bad Boy" Makoto gets at least an honorable mention, as Hope Crusher extraordinaire. He puts Kiyoshi out of commission once and is no less ruthless during their next match.