The spirit's eyes narrowed, glancing down at Hajime's belt before back at his face, trying to assess the situation. As much as his host was a thorn in his side at times, he could be irreplaceably helpful at times; he could lean into his host's mind and find out just who the hell this annoyance was and how best to handle him. It was highly annoying to not have that resource right now...

"Tch..." With that irritated sound, the pretense was dropped. Hair became more wild, eyes darkened and one hand went to his hip as he took a more arrogant, open stance. "Yadonushi never mentioned me?" he asked with a trace of annoyance.

Even with the understood translation, the hint of switch between normal Bakura's polite speech and use of "boku" and the arrogant "ore" of the spirit was clear.