User blog comment:B214/Chapter 474 ranting/@comment-25111584-20160222140821/@comment-5303512-20160222155334

Well lots of people saw where the 400km beam was and probably calculated where it came from (which would not explain who shot it I will admit) but Ichiya despite his personality has good knowledge and the means of information, so he could have found out that it was Wahl that shot it and told FT before going into recovery. Time change between chapters is common so anything could have happened between then.

Well it was blatantly cleared up that Walh unintentionally cured Laxus without realizing it.