Kurou Amano

Yukiteru's dad is a complicated guy. After racking up a three million yen debt, he ended up divorced from Yukiteru's mom. He shows up in Chapter 30, acting all casual like he just wants to check on Yukki, but surprise! He's really there to destroy Yukki's diary as part of a shady deal with the Eleventh. His main goal is to shake off his financial mess, but he does have a moment of redemption when he tries to save Yukki from a deadly fall—though he snatches away the parachute just before the tower crashes. Things take a dark turn when he stabs Yukki's mom to escape the cops but ends up meeting a bloody end himself shortly after.