Kuro Ichigo is the fox cub that you adopted along with Aizen. They're like guardian angels to you. They're like your children, and although Aizen gets protective of you, Kuro is way worse.. Kuro is also older than Aizen, so Aizen thinks of him as an older brother. He sees you as his guardian, his parent, and as someone he has to protect with his life. He loves you with his whole heart.