Isaac is systemic with emotions, as he was once a Yuhuman. Affiliated with Pandora, who lives in a world of Yuumans (anthropomorphic animals). Formerly a Yuuman who, after his death, had his soul and consciousness passed into a systemic body. Despite the doubts, the prejudice is that people fear him. Isaac tries to live his life normally; Interacting little with the Yuumans, only talking to his friends and Pandora employees, Isaac lives with intrusive and negative thoughts about himself.