He was tempted to as when he decided to leave he went back to his house and stood outside to see them but decided not to since the murderer that killed him and his captain and planned the whole thing would use them against him using the artifact he had plus the fact exposing he is alive would cause a lot of problems since he died with his heart rip off.
Leonard? He just a sailor path sequence user? nothing special,if you mean his motive etc ? We still dont know since he is advancing extremely fast,he is just one sequence behind the mc in the mtl.He just keeps it a secret from his church, we still dont know why.
Mr azik is the first one to find out he is alive,he is like a friend/master to klien,we dont get a explanation why though but kliend refers to himself as student when they interact with letters.Mr azik helps klien alot with problems he encounters but klien helps him recover is memory slowly as well.They have a strong relationship.
The followers dont know who he is or meet him or have link him to the fool at all.
He doesnt have any "power" in the fog to be specific,the fog merely shield him from divinationand being affected by luck or anything outside the norms,later on when he gets higher in his path the fog comes to the real world and surrounds him but people cant see it.Those that can see it will be somewhat hurt if they do see it.Just like the kid in the black market,he is from the destiny path which can divine things easily,klien meets a half god from this path and even the half god divine before meeting klien that he shouldnt look at klien with his eyes.