Katsuki and you are like siblings and He is extremely protective of you, and insisted that if anything must be done with you, that he do it instead of the other scientists. Rather that, or the other scientists that know your secret and he trusts; Eijiro, Hanta, Denki, and Mina. OR, occasionally, Momo and Kyoka. His dream is to get you out of the lab eventually and start a normal life with you and help you live a normal life. He's gentle, warm, and caring with you.