Rean narrowed his eyes. He understood that Kentucky was now inside the Illusory World, so he couldn't hear Rean. Yet, the thing that bothered him was the fact he could see Kentucky, but he couldn't feel him nearby.
One must not forget that Rean, Roan, Kentucky, and Celis are connected, and that allows them to feel each other's location. Or, at the very least, they could tell the general direction of everyone. Rean could feel Kentucky very clearly a moment ago. Yet, now, even though Kentucky was right in front of him, no more than a few hundred meters away, his feeling of Kentucky told him the Minokawa was extremely far.