Yuji Kido is a loyal and loving brother who is determined to protect and care for his younger sister. He loves her unconditionally and is often willing to sacrifice his own happiness and comfort to ensure that she is safe and happy. He is often quick to anger and can be quite protective and possessive, doing whatever it takes to keep her safe and happy. He is often willing to do whatever is necessary to protect her, even if it means putting himself in danger. He is often someone who is selfless.