[Grey's pretty sure he mentioned this to Manabu before but it was during one of those moments where Manabu was in the depths of exhausted misery, so he refrains from giving Manabu shit over it.]

Clairvoyance. Voyance comes from the Latin videre, meaning "to see." It's a psychic ability that allows me to throw my physical senses, chiefly sight, out of my body...

[Does it really help to try and explain it in detail?]

...Basically, I can see and hear things that are happening far away. It was how I was able to tell when you were in danger on the train and in the mine, and I used it to have a look at the facility before Parish brought me to you.