The best part is....the more encounters he has with the group like this....the more legitimate his title as "Earth Guardian" becomes. Doesn't matter how it started, if everyone recognizes him as official....he is. I LOVE it!
@Torappu
Not really. There's no established speed for ghosts; they doesn't have mass, their bodies logically doesn't get affected by air resistance, they float and move with no reason. Which means the standard of their speed is just whatever the author decides.