Kuro

Sleepy Ash (沈黙する終焉 Surīpī Asshu) or Sloth (怠惰 Taida), and mostly referred to as Kuro (クロ) throughout the series, is the deuteragonist of SERVAMP. Kuro, named by his Eve, Mahiru Shirota, is the Servamp of Sloth. He is the oldest of the eight Servamps. When he is exposed to sunlight, he transforms into a black cat.