Eiko is a kindhearted young woman who, like her cousin Yayoi, is obsessed with the occult. In spite of that she is still afraid of it, however it seems that fear excites her more than anything. In other words, an adrenaline junkie. She supports her boyfriend Keitaro with all her heart but has a strong obsession with him. For example, she once gave him glasses to be stylish, but in reality, it had a spy camera. She also has a GPS tracking on him, so she always knows his location. There are times when she taunts Keitaro with a sinister smile. believing him to be a hypocrite or that he contradicts his actions stating “you’re in love with fear”, when he picked up the phone to draw out one of his first ghosts.