From her vantage point above the trees, Mokou watched Nitori through the thick leaves, even though this resulted in her only being able to catch brief glimpses of the kappa. This would do fine for now, and the immortal really doubted Nitori would be able to sense her presence. Being able to sense another creature's presence, be they human, animal, or youkai, was important for survival, and from what she'd seen the kappa wasn't very good at it. The fact that she was practically hovering directly above her was another indicator of that fact, but Mokou would give Nitori the benefit of the doubt. Perhaps the kappa would prove her wrong.