The Dark
Hiro was not afraid of the dark. At least, that's what he had told him self after that one night when he was five and Tadashi sat with him after a nightmare.
He believed it too.
He was not afraid of the dark and that was final.
But after the Incident, after nearly killing his brother's killer with Baymax, Hiro began to understand that he was indeed still afraid of the dark. This dark wasn't in his room. It wasn't in an alley somewhere.
This Dark was in his very soul.
And Hiro was terrified that it would swallow him.