S2E14 : Hidden Cove

Yura and Sumi, the former's caretaker, were close friends. Eventually, as they were moved apart, Yura could still feel Sumi's presence. However, whenever that happened, she'd become like an empty shell, worrying her father. As Ginko comes to know of the case, he proceeds to offer them advice, as the condition is caused by a mushi that can connect people's minds.