Tomoyasu and Takeshi’s Loyalty
Bullet TrainThe Prince tries to make Tomoyasu betray his beloved dog, but Kimura’s intervention preserves their bond and exposes the coercive structure around them.
increasing
Bearing strength in each event
decreasing
A Friend Under Pressure

A Friend Under Pressure
Loyalty used as leverage
The Prince selects Tomoyasu for punishment and orders him to bring his dog, Takeshi, to the park. Tomoyasu’s fear is intensified by the possibility that refusing will make the other students suffer too.
The Prince’s aim is not simply to test a device. He wants Tomoyasu to betray a beloved companion and then live with the shame of having chosen his own safety.
The Experiment Interrupted

The Experiment Interrupted
A bond survives coercion
Kimura finds Tomoyasu and Takeshi tied together as the students prepare the prototype defibrillator. He removes the pads, cuts the restraints, and fights the students who try to stop him.
Tomoyasu’s bond with his dog becomes visible through the boy’s attempts to calm him. Kimura’s intervention prevents the Prince from turning that attachment into a forced betrayal.
A Lesson in Resistance

A Lesson in Resistance
A fragile alternative
The episode shows Tomoyasu and the other students that the Prince’s orders can be interrupted. Kimura’s strength makes that possibility immediate, even though it does not dismantle the school’s wider structure.
The dog’s rescue preserves a small, concrete act of loyalty amid a system designed to break it. That memory also helps explain why the Prince later treats Kimura as a personal adversary.
Several months before the train journey
At the neighborhood park, during the defibrillator episode
After the park confrontation, before Wataru’s fall