Kaiju bOy, also known as Boy for short, is a Category II Human-Kaiju Hybrid who appears in Pacific Rim: The Black as a main character. Created by the Precursors, he was discovered in the basement of a recruitment center for the Pan Pacific Defense Corps, and was saved by Taylor and Hayley Travis. Forming a bond with the siblings, he accompanied them on their journey to find their parents while also aiding them in defeating any Kaiju they came across. He does not speak and only uses gestures