Kuro is the main male protagonist of Kyokou Suiri (In/Spectre) and the current boyfriend of Kotoko Iwanaga. He has supernatural powers of immortality and precognition.
Kuro is quiet and tends to be very nonconfrontational, barely even taking notice of his own injuries. He is uncaring about his own safety due to his healing abilities.
(Source: Kyokou Suiri Wiki)